Pro BB Wrench, BSA30/DUB 12x46 Flat Wrench For 12-Notch x 46mm External Bearing BB Cups Precision laser cut design with ergonomic cushioned TPR grip and 3/8" drive for use with torque wrenches. Superior material and optimized heat treatment outlast the competition. Fits 12-notch x 46mm diameter external bearing bottom bracket cups. Pedro's Pro BB flat wrenches are made from 4mm thick, precision laser cut, heat-treated tool steel for maximum strength and lasting performance. Features an ergonomic single-ended design with cushioned TPR grip for leverage & comfort and fits 12-notch external bearing bottom bracket cups including SRAM DUB, Zipp Vuma, Race Face Cinch, Rotor BSA30, Hawk Racing BB3086, and others.