Lube Shuttle Grease Gun, safeLOCK and LockNlube Coupler Review

Sense I made this video I tried the safeLock coupler on grease zerks on a trailer and had trouble getting them to stay connected. I will continue to use both couplers and do a follow up video.
Review of the Lube Shuttle Grease Gun and Review of The safeLOCK and LockNlube grease couplers
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