Climax Metal C-100 Shaft Collar, Zinc Plated Steel, Set Screw Style, One Piece, 1 Bore, 1-1/2 OD, 5/8 Wide, With 5/16-18 Set Screw

Seems like a good quality of steel

Installs easily

1 inch steel collars with hex/ allen wrench screw. Fantastic collars. I originally bought four for two of my weight dumbbells. I just bought eight more for some of my other 1 inch weight dumbbells. Great quality. Tightened the screw with an allen wrench I had and it feels very tight. Perfect fit. Dont make the same mistake I did and buy those cheap plastic 1 inch collars. Instead by the solid steel 1 inch collars. The picture has an example of the cheap plastic ones that you dont want to buy. In the picture I also left the twist collar on too only because I had room but I would feel very comfortable just to put this collar on if I ran out of room on the bar.

Easy to install

Excellent product well-made works perfect!

Good item for the price

Perfect

These probably work great for 1 inch precision machined shafts, but they are too small for 1 inch round tube stock from Home Depot or Lowes.

Annoyed by the nut coming loose every time I put them down I resorted to this collar and voila, the plates have not moved in 3 sessions.

Shaft collar worked finr