Using a Diamond Core Bit to Drill Through Concrete Curb

dallasdrainagepros.com
Having used both a carbide and diamond bit, we can safely say there is no better way to go through the curb than with a diamond core bit. Assuming you have the right machine (and having RPMs in the upper 2000s matters) a diamond core bit will make quick work of a curb - in as little as a few minutes! A good bit will cost a couple hundred dollars, but it's worth the cost if you plan on doing more than one of these.

[@BabaJorda]

looks great. what is the model and amp of the drill machine ?