The Proloc™ 1 Collar fits any bar with a diameter ranging from 1.937" to 2.007" (Fits most bars, Fits all Olympic bars)
Compatible with Olympic bars and Powerlifting bars as well as most logs, cambered bars, Swiss bars, and safety squat yoke bars.
The Proloc 1 features an easy on / easy off knobs that work as smoothly as most spring clips. These are legitimate universal collars that can serve an entire weight training facility for years.
The Proloc 1 Collars are a most have if you own a specialty bar. The folks at Serious Steel got them to me faster than they predicted.