Sorinex Husker Collars
I just picked up a pair of Sorinex Husker Collars as my Rogue HG collars have worn out in less than 6 months, one wont lock at all and I have re secure after every other lift they do have a lifetime warranty i believe all I have to do is send the broken one to Rogue and it will be replaced, I didn't want to have down time so I bought the Huskers... . Yesterday I completed my first round of heavy OLY lifts without having to re secure at all through the whole workout. They are ***effing MASSIVE***though and have a simple locking mechanism. they dont need the whole surface area of the collar to lock so i can lock them on the sleeve with about 10mm of space and have the collars hanging off the edge. These Collars from Sorinex do work well.... The only test they have to survive is the test of time. They are guaranteed for life by Sorinex.
I was able to drop a 185lb overhead press from 7ft with little to no movement from the collars (about 1 cm).