Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts.

Fits all Campagnolo cassette lockrings
Also fits Campagnolo Record, Chorus, Centaur, and Athena bottom brackets
The outside diameter of the BBT-5/FR-11 is 22.8mm and has 12 splines
Always use a skewer or axle nut to hold tool firmly in place during removal and installation
Center bore for axle or spindle clearance is 16 mm