How To Make a Cobra Bag Using The Kewlus Cobra Bag Spring

Latest version video of the complete DIY cobra punching bag build: • How To Make a Cobra Ba...
Since this video and since launching the Kewlus KS2 Cobra Bag Spring I've done lots of tests and came up with many important modifications to make this the ultimate DIY cobra punching bag. Watch this video to get started: • How To Make a Cobra Ba...
You can order the Kewlus KS2 Spring here: kewlus.com/products/kewlus-sp... Detailed instructions here: kewlus.com/blogs/diy/how-to-m....
Check out the full build and review video by one of the top boxing gear reviewers, Carlo Rosauro at CSquare Boxing: • DIY Cobra Reflex Bag W...
Cobra bags explained: kewlus.com/blogs/general/cobr...

[@ibrahimowicz92]

This guy is positively bonkers. Australians are just a special breed, gotta love it.

[@jacobavramis9888]

Just bought your spring after looking at reflex bags for years and seeing them all mostly fall apart even at $300+. You have an amazing idea here man I hope it takes off like crazy cuz your build is solid and not a ripoff, you're a good guy for doing this THANK YOU!

[@jamesalanroberts]

This dude is a legend, been a huge fan of his videos for a while now. Love being an Insider too Reedy 🥊💯

[@Pie7ino]

funny enough this speed bag looks better than the ones that i can buy in the uk

[@ashleecahusay3105]

Tip: you need to adjust that down at your chin to improve your speed punch and nice and smooth punches

[@johnsanchez8029]

That damn spring makes the biggest difference! Way better than without having the spring. Very clever, friend. May God bless you.

[@creaase406]

Super excited for this new spring. Speed on it looks crazy!

[@JesusiDream]

Dude has some fast ass hands .. this spring is a lot faster in person.

[@joshuacowell8969]

Legendry effort mate. I love this idea

[@JBDacasinJr]

The goat of combat diy.

[@josephsundstrom7950]

Your too good at making these now. Lol. Even ur comfort level is seemingly much higher as is the production rate. Awesome 👌 I'm gonna make this new one

[@mathewhernandez3197]

Greetings from California, you are gonna save me loads of money sir. Thank You!!!!!

[@raygsbrelcik5578]

I've always been Innovative myself---haven't always had the funds to afford Pro' equipment, so I made my OWN! I've watched several of these DYI videos; This is one of the better ones.

[@believeinfidelity]

Keep up the great work!

[@masterofbeastofgames]

Love this bag - it's tiny, fast and well balanced

[@SilverHorde96]

Just pre-ordered. Good stuff mate, I'm a huge fan of your work!

[@Kewlus]

Thank you 👍😃

[@academiadeboxround1223]

@@Kewlus where can i order

[@Kewlus]

Preorder here: kewlus.com/products/kewlus-spring-ksr12pro. New stock coming in a couple of weeks

[@HuyTran-up9dz]

you are amazing!! so much respect, subbing right away

[@Kewlus]

Thank you 😃

[@barrybatiste9363]

Got the order to go through on my other card my pro spring pre-order

[@thismerealname6412]

I cant wait for the wall mounted pad

[@vishaltorne5282]

Excellent bro👍

[@deskelly9313]

I don't even box but here I am subbed

[@joedamore9350]

The pool noodle thing is genius

[@Y0o0o0o0o0o0o0o0o0ow]

Thanks for this! I'm gonna make one with a motorcycle shock.

[@manuelfuentes1546]

Espectacular 👌 te felicito...gracias por enseñar 👍👍👍

[@youngelkim9004]

just pre ordered the spring :)

[@Kewlus]

Thank you 😊

[@barrybatiste9363]

Did you use credit card

[@anthonyzhang4918]

just bought one!

[@Jskd06]

Just pre-ordered, would love to know how you made the adapter to use a normal speed bag and the height adjustable adapter, keep up the great work!

[@Kewlus]

Thank you 😊 the speed bag adapter and height adjustable mast videos are coming soon 👌

[@nickvandersluys92]

Pre ordered 👌🏼

[@Kewlus]

Thank you 🙏

[@nanigami969]

Hey can u make another boxing hand wraps???

[@60gidget]

After converting each component into US to AUD (australian dollars) I decided it wasn't going to be cheap. Luckily one full set popped up here in Australia for sale for 185 including postage and i snapped it up. So excited, can't wait for it to arrive, much cheaper than the other brand which are selling for over 400 AUD. Sweet.

[@Kewlus]

Yep you got yourself a sweet deal - that's a demo set which includes the set of Stabilisers, which have not even been released! With the stabilisers, I recommend placing cardboard at the bottom of each sand bag before filling up the bags - that'll give you a more rigid base. I'll post it off to you on Tuesday. Cheers.

[@sh3aibamoulaqsyba777]

Cani i have all component please ...tanks

[@juanguerrero8572]

Excelente!!!!!

[@juliusdc8950]

Can you get those spring at Bunnings? Great video mate👍👍👍

[@Kewlus]

Thank you. Not at Bunnings yet, just on my website kewlus.com/products/kewlus-spring-ksr12pro

[@l.sdarkholme7559]

I got the pre-order.

[@Kewlus]

Thank you 😃

[@watkinsrcful]

Nice

[@raylmao0596]

This is a great cobra bag from what I can see. I want to make my own cobra bag just like this, can you please tell me how you bolted the flange into the mdf board? Did you use an electric drill or tool of some sort. Thanks in advance.

[@Kewlus]

Yes I used the flange to mark the first hole, then drilled it with an electric drill. Then I bolted the flange using that hole and drilled out the other holes using the flange as the guide (drilling directly through the flange holes). After drilling each hole I would put a bolt through and tighten. Drilling and bolting one at a time is the best way to do this. I used 5/16 or M8 bolts

[@raylmao0596]

@@Kewlus great thank you!

[@ezek4765]

just pre ordered it! hoping to get in shape :)

[@Kewlus]

Thank you 😊

[@alfiejacildo1518]

I duuno why this video isn't viral

[@barrybatiste9363]

Had to buy light weight bar on smart boxing still trying to preorder your spring to

[@Kewlus]

I replied to your email. Perhaps try paying through PayPal which is a different payment gateway. Not sure what the issue is. Please email me if you are still having the issue.

[@barrybatiste9363]

Ok try use paypal going buy card

[@barrybatiste9363]

I was using usa bank debit card

[@sabet3600]

Great

[@rdj5715]

Its even better than a professional bag 🤣

[@kobedo8195]

can u show us how to the mdf board. Having lots of trouble with building it.

[@Kewlus]

I’ll do a top tips video this week and will try to cover that

[@damonvilla]

is there any way to mount the spring to the pole without the hose clamps? I really liked the idea of the last spring being screw on but it is sold out.

[@Kewlus]

Yes you can simply tape it in place with thick duct tape 👌

[@lalalala-ce3fn]

Does the Keewlus spring (the regular one) get more flexible over time? Cuz mine is very very stiff. It's like a complete different one than the videos. Any help or tips?

[@Kewlus]

It’s designed to stay stiff. Can you post a video of your setup on Instagram?

[@administraciondefincasalma1878]

i ve just bought you a spring , i hope enjoy a lot with it, one question, Hoyw do you adapt a standard punching ball? What do you use?

[@Kewlus]

Here’s the video to show you: kzbin.info/www/bejne/naOVqXh4ltmZbpY

[@administraciondefincasalma1878]

@@Kewlus thanks bro, greetings from spain.

[@jesussaves5062]

nice nice

[@faisalsafi7104]

Just wondering, when will these spring be out, as I'm going to pre-order?

[@Kewlus]

Expecting to be shipping in mid February

[@PARCIVAL98]

Como puedo conseguir un resorte exactamente igual en la ferreteria? Como pedirlo?

[@bogsticz9444]

I have a question, how long does the spring need?

[@immanuelgranato1141]

I just bought your pro spring but could you drop the link for the hose clamps so I can order them as well :)

[@Kewlus]

Thank you. You’ll find the link here: kewlus.com/blogs/diy/how-to-make-pro-cobra-punching-bag

[@Kewlus]

Butterfly clamps: amzn.to/35jfkjI

[@kobedo8195]

I can’t find any butterfly hose clamps. What can we replace that with? A stainless Steel hose clamp the same?

[@Kewlus]

Yeah that should work

[@ConnorLyon]

Reedy what tape did you use for the pool noodles? Standard duct-tape? Something different?

[@Kewlus]

Yes just standard duct tape. The stretchy type. Wide roll

[@demircashmoney]

Any idea on when the new components like the arms are coming out? I really am looking to buy a cobra bag but the thought of building one interests me. I'm gonna buy the Kewlus Pro Spring but not sure if I should buy components from other places or wait for yours to come out. When do you reckon all your other products and components come out?

[@Kewlus]

The Kewlus Cobra Head, which is genuine leather covered foam speed ball on a composite arm is coming later this month. Height adjustable stand is coming the following month. 🤞

[@demircashmoney]

@@Kewlus Will the speed ball have the shape of an actual one or the diy shape ones seen in your videos? And lastly if I were to buy all 3 components (spring, arm, stamd) all I would need is a base correct? Love the videos btw, I subscribed

[@Kewlus]

Thank you. Yes the speed ball will look and feel like a real leather speed ball. The stand will come with a flange that you could bolt to concrete. There will also be a couple of optional bases, including a 4-suction cup base for a smooth surface and a sand filled base for carpet.

[@demircashmoney]

@@Kewlus ahh perfect. I was thinking as well to just get the ball with arm, spring, and leg and build my own suction stand. All in all with the products including the Bag with Arm, Spring (50$), Leg, and Base how much will it cost in total?

[@Kewlus]

I’ll price each component as I release it. Hard to predict as I don’t yet know all the costs

[@real-jj3ei]

You saved 45000 thanks

[@paramxo4054]

Will the kewlus spring fit in hayabusa cobra reflex bag setup?

[@Kewlus]

No

[@aldotrinidad7877]

How thick is the wire? Thanks!

[@NamNguyen-hx7iy]

Any suggestions on stabilizing the pipe into the flange without using threadlocker or adhesive on the threads? I’m getting quite a bit of wiggle there.

[@Kewlus]

That’s unusual. I’ve never come across a wobbly flange. Could it be a defective flange or pipe thread that you could exchange?

[@NamNguyen-hx7iy]

It’s more of the shaking of the pipe that goes into the flange, which eventually causes the pipe to get loose on the flange. I have to screw it back in tight after about thirty minutes of punching. I actually see you address this in one of your spar bar videos where you stabilize the pipe with PVC support at the base. I don’t have as wide of a base, so just trying to come up with a solution on my 2’ circular base.

[@Kewlus]

In my case the pipe actually gets tighter in the flange. The one I installed at the local boxing gym doesn’t get loose either, so I really don’t know why yours gets loose

[@rafaelrodriguez8626]

I have a Ringside Cobra Reflex in which the spring got messed up. Can I used the Kewlus spring to replace the spring that came with it?

[@Kewlus]

It’s not really compatible

[@fagnerpetroski8313]

Hi, I really like your videos, I learned a lot from watching... I made my homemade cobra bag... I just couldn't find the right spring, I tried to make a purchase on the website but it doesn't deliver here in Brazil. "Cry", could you send me the spring specifications so I can build one... please... hehehe

[@Kewlus]

Do you know anyone in the USA that could buy one for you and mail it? If not, contact me via my website and I’ll see what I can do

[@fagnerpetroski8313]

Worse than not, I wish I had someone I knew out there... I would have already asked them to matter to me...@@Kewlus

[@hectorenriquelopez2966]

GENIAL

[@Jskd06]

How did you get the 3/4" pipe to slide into the 1" pipe? isn't there a welded seam inside that gets in the way? I went to home depot today and tried to do it but all the pipes had a welded seam inside of them.

[@Kewlus]

I got the pipes from Bunnings (hardware chain of stores in Australia) and they fit perfectly. I guess it might not work in every country as they are manufactured to different standards. Is there any way you could file away the welded seam inside?

[@Jskd06]

@@Kewlus It would be difficult to grind inside of the pipe the whole length thru.... I think I could probably grind a small channel on the outside of the 3/4 pipe so that the weld fits into it.

[@Kewlus]

Yeah what a bummer. Worst case scenario you might need to join small sections of pipe to increase or decrease height, but I’d recommend using the one inch pipe and flange for the bottom and a reducer to go to a small section of 3/4 inch pipe. I’ll show it in my height adjustment video that’s coming soon. Thank you for letting me know 👌👍

[@barrybatiste9363]

Trying order spring won't let my card go through

[@jalenaquino9385]

Hey reedy, where’s the link to the clamps on Amazon?

[@Kewlus]

It’s on the DIY post kewlus.com/blogs/diy/how-to-make-pro-cobra-punching-bag

[@joseantoniorosainfante156]

Súper

[@boazshriki1168]

Can u do a video that u show as how did u do the Masking tape so tight?

[@Kewlus]

Ok I’ll do that

[@boazshriki1168]

@@Kewlus thsnks u very much

[@user-et9zu1vq3r]

شكرا لك على ترجمة الغه العربيه

[@theweekendoddz1176]

what's the dimension of the spring? thickness, diameter and length?

[@cyantadeo975]

Hey man great video, whats the total price after getting all the materials?

[@Kewlus]

Around $90

[@cyantadeo975]

@@Kewlus oh okay thank you! I will try to build one

[@MischaS94]

Can you use a stainless steel pipe instead of galvanized aswell?

[@Kewlus]

If it’s the right size and you can get a flange for it the possibility yes

[@welshdober]

I live in Canada where can I go buy a spring? home hardware? Home Depot Princess auto one of those types of places?

[@Kewlus]

You can just order one here: kewlus.com/products/kewlus-spring-ksr12pro

[@juanguerrero8572]

Buen día amigo, esos resortes donde se consiguen? Buen video

[@Kewlus]

kewlus.com/products/kewlus-spring-ks2

[@francobisio7770]

What are these types of springs called? because it does not reach us in Argentina. good video

[@Kewlus]

These are compression springs. It’s free shipping worldwide including Argentina. You can preorder here: kewlus.com/products/kewlus-spring-ksr12pro

[@francobisio7770]

@@Kewlus Thank you very much, at this time the things that come from outside the country are retained in customs

[@Kewlus]

Ah ok. Sorry to hear that brother

[@caseynguyen]

my screws keep coming loose from the punching is there a solution to that?

[@Kewlus]

Use bolts instead and put rubber feet on the underside for clearance for the bolt heads

[@_VC93]

Hey mate, can you get those pipes from Bunnings?

[@Kewlus]

Yes 👍

[@ismails7627]

My pvc pipe is 25 mm, do you think the spring will work on it, if not, any tips ?

[@Kewlus]

If the outer diameter is 25mm yes it will fit

[@austinlai932]

Can I use a PVC pipe for the bottom pole?

[@Kewlus]

Not recommend as it needs to be sturdy and PVC has some flex

[@sh3aibamoulaqsyba777]

Can some one tele me all components please and where i can find theme...thanks

[@marcschoenbach2397]

How tall should the rubber feet be? And will using them make the platform wobble more?

[@Kewlus]

Just enough to provide clearance for the bolt heads. They don’t add any wobble

[@marcschoenbach2397]

Reedy Kewlus thanks so much for the fast reply!! You’re the best

[@rohanshouker8937]

Has anyone got a link to the gavanlised pipe can’t find the one with the right diameter

[@Kewlus]

What country?

[@rohanshouker8937]

@@Kewlus uk

[@Kewlus]

Look for a 20mm pipe. Outer diameter 26.7mm. Details here: kewlus.com/blogs/diy/how-to-make-pro-cobra-punching-bag

[@lakiskrystal7381]

I have a question.if I use a two feet wooden square platform how I can get close to bag for short inside combinations??

[@Kewlus]

Just step onto it. You can also put a mat over it

[@lakiskrystal7381]

@@Kewlus or I can cut it a little.let's say 10cm.

[@Kewlus]

The bigger the more stable. Check this video: kzbin.info/www/bejne/jpqpkH6Cf9qob5o

[@Quellebreo373]

Will the spring’s release date be announced in the video?

[@Kewlus]

Yes

[@Quellebreo373]

@@Kewlus just pre-ordered the spring off your website

[@Kewlus]

Thank you 😀

[@sezgincelik2096]

Give me the sice for this spring

[@lawdizon9565]

When will the Pro springs be in stock and ready to ship?

[@Kewlus]

It’s now in stock and shipping out to customers as fast as we can 👌😃

[@lawdizon9565]

Thanks. Just placed my order!

[@michaelhudson7415]

Was there something wrong with the regular diy reflex bags. I know you made a lot of revisions

[@Kewlus]

Like you said I made many revisions to perfect it. The Kewlus PRO spring is my latest design and works better than anything that I have made

[@fernandogodoy9377]

Hola Con que PegamentoUsa Para Pegar la Pelota

[@Kewlus]

No glue, just tape.

[@martywob]

I also cannot find the butterfly clamps, is this build possible without the clamps, online and hardware stores just can't seem to find the right size, just got the spring but can't find clamps anywhere, and ones I can find just do not seem to be the right size.

[@Kewlus]

You can use any type of hose clamps, but you might need a screwdriver to tighten and loosen

[@Kewlus]

You can also simply duct tape in the meantime it while you look for clamps

[@martywob]

@@Kewlus great, thanks for the info

[@barrybatiste9363]

Does your site take debit cards

[@barrybatiste9363]

Do I need put money on paypal don't have credit card just debit card

[@deliriousiza1563]

When is the spring going to drop and ship????

[@Kewlus]

Shipping from Canada in February

[@kingkr8586]

nice where can i get the pro version will it arrive quick to canada toronto?

[@Kewlus]

kewlus.com/products/kewlus-spring-ksr12pro and it will be shipping from Toronto!!!

[@kingkr8586]

@@Kewlus is it available now or soon?

[@Kewlus]

You can preorder to ensure you get one. Expecting shipping in February

[@kingkr8586]

@@Kewlus ordered!!

[@Kewlus]

Thank you 😊

[@cesarochoa1088]

Que resorte es?? De que medidas sera

[@Kewlus]

You can order them from kewlus.com

[@FuckYourCredentials]

Hey, what's the dimensions of your ndf base??

[@Kewlus]

About 2 feet wide and 3/4 inch thick (16mm)

[@miguelsoto9579]

Hey buddy can I order one before u get them ??

[@Kewlus]

Yes you can preorder kewlus.com/products/kewlus-spring-ksr12pro

[@AA-oc3kx]

How heavy does the base have to be?

[@Kewlus]

60 to 80 ponds. You can also make a suction cup base for a smooth floor which is coming up.

[@christophercarter6151]

KS2 or KS3 ?

[@barrybatiste9363]

Faster than fierce reflex bag

[@Kewlus]

As fast as you need with adjustable speed 👌

[@barrybatiste9363]

Sure right

[@dulguunmunkhjargal5992]

I need it thus spring where is the buy what is the size ?

[@Kewlus]

kewlus.com/products/kewlus-spring-ks2

[@saiyanrivals1612]

Is it true that you’re planning on selling your own cobra bag with the kewlus spring?

[@Kewlus]

Yes! I’m currently working on the manufacturing processes for the other components 👌

[@saiyanrivals1612]

@@Kewlus awesome can’t wait to see. looking for an alternative to these crazy priced bags from people like ryan garcia lol

[@lalalala-ce3fn]

@@Kewlus I know its probably a bit too early but what is the price youre planning to sell for? For the whole cobra bag

[@jesussaves5062]

🥊🥊

[@Kewlus]

I don't have a price in mind as it depends on production and shipping costs and I don't know all of these costs. I'll make sure I have affordable options for all. I'll sell components, like the Kewlus Spring, Adjustable Kewlus Arm & Kewlus Leather Speed Bag, Adjustable Kewlus Mast & Kewlus Base. I will have different versions of components - Standard and PRO, like the KS12 (coming soon) and KS12PRO. The standard components will be lower priced. Thus the total price will depend on what options you choose. You can also choose to make your own components to save money, but everything will be compatible so it will be up to you.

[@trojanboxing9873]

Good day What’s the length of the spring.

[@Kewlus]

12 inches

[@trojanboxing9873]

@@Kewlus that’s what she said ha ok cool I’ve subscribed to your channel also, I’ve got some ideas my self. Keep up the good work mate.

[@Kewlus]

😂😂😂

[@KakashiHatake-bo8ev]

Hose clams accesorio azul para los.dedos no lo encuentro en Amazon Hose clams Accesory blue not in Amazon

[@Kewlus]

I’ll be selling them soon