Review on PROLUBE Quick Disconnect Grease Coupler: Mess-free & Hands-free Operation, 8,000 PSI Capable, Works with All Grease Fittings - #43546 by Ashwin Chauhan

I put 3 because I like the design. Used it on a Fireball grease pump on a 55 gallon drum on a service truck. Easy to use. However, this lasted about 3 days of intensive lubrication of excavators, earthmoving machines, etc. After a thorough inspection, it was found that the ball bearings on the locking mechanism had worn out, preventing them from holding when fastened. I was really hoping for the best but was disappointed. I cannot recommend this clutch. May last longer on a manual grease gun.