Olympic Barbell Collar, Dreapark 2" ABS Barbells Locking Collars Clamp with Quick Release (1 Pair, Black)

They do exactly what you would expect, secure plates. In my experience they are easy to open and provide really good clamping force so there isn't any slippage but I dont drop the bar so I haven't tested them to that end. I bench, curl, clean and jerk, dead lift and squat using them and have not had any trouble with them. So for me they are great.

I own four sets of quick release collars for my home gym from three different companies. These are by far the poorest quality of all the brands I own. They simply do not clamp tight enough and will slide on your barbell. The cost savings for this product is not worth the poor function. I recommend the Rouge HG collar out of the brands I own.

I ordered two pairs for my home gym (I have multiple bars). They're both perfect. These are much easier to get on and off than the spring type collars I'm used to. They go on and off really easy. Most importantly, they don't move.

These work just as advertised and do an awesome Jonathan locking the weights in place. They are so much easier to use than other metal locking mechanisms, and allow for an extremely quick weight change on barbells. !

Holds the weight tightly in place.

Bigger than I expected. Work well.

2 months later and they still grab on to the bar like the first time I used them.

I must have received defective clamps because mine slide around while I am doing bicep curls. I read a review stating the ones they have do not slide while dropping a barbell from overhead but I wouldn't trust them to hold 5lbs.....