Pedros Pro Cassette Lockring Socket

The Pro Cassette Lockring Socket gives a precise working profile for suitable HG-style lockrings, without a central guide pin restricting access.

The 12-spline profile has a 23.5mm outside diameter, with 3/8-inch square and 24mm external drives. The stated internal clearance is 19.8mm diameter by 21.5mm deep; actual lockring and axle fit must agree.