Retro-tech is the story here: collars that require a wrench and hang on so tight that they bite into the bar. They're not recommended for your fancy new Eleiko bar, but if you've got plate-loaded dumbbells or kettlebells, these collars work and the teeth you save might be your own.

Electroless nickel plated. Large size for Olympic bars (approx. 1.97" diameter), 1-1/2" in width. Comes with an IronMind wrench (even that's made in the USA, of course).

No. 1226-L

Large 1 pair (3 lb.) $56.95
Large 2 pairs (6 lb.) $106.95