They utilize a heavy-duty threaded T-screw/wing-nut spin lock design that compresses firmly against the bar sleeve. Functionality: Fully tested. They clamp down tightly and lock securely to the bar.
Vintage DP Superstar Exercise Shoe Dumbell Bar Combination 1979
Vintage DP 1" Barbell Spin Lock Weight Collars DIVSIFIED PRODUCTS 1980's-90's
Vintage York Barbell 2” Olympic IRON Spin Lock Compression Collars Pair Set
Vintage York Barbell Olympic Spin Lock Compression Collars
Vintage York Barbell Olympic Collars (pairs)
