These don't fit my specific dumbbells well. They slip towards my hands, off the little nubs at either end of the handles. When they slip off, they are too close together and are uncomfortable on my hands. I can see why they would be great on a set of dumbbells with different handles though.

Fantastic collars. Love that they adjust so they can fit any sleeve that is not the standard size, or you can just adjust them so they clamp on more or less tightly to the sleeve.

Don't use these anymore, since getting a full set of fixed dumbbells, but they did the trick while I used them. A little too big to be comfortable in hand though.

Love this thing for assisted dips. Got it for that and it works great for that. Didn't try anything else they say you can use it for.

Just ok dumbbells. The knurling on the handles is very inconsistent from one handle to the next. One of the pairs rubber head started turning white, but the other 19 pairs didn't. Also, the racks that came with the set (5-100) was not meant for such heavy dumbbells. I had to reinforce the shelves to stop them from sagging so much that the dumbbells would almost slip off one side.

Love this treadmill. Had for years now. Still works for everything I need it to.

Love these bumper plates. Can be hard to hold on to the 45s when they are new, but they get a little more grippy and easier to handle after a short time.

Very low quality. I use it for the landmine and nothing else.