Having the right tool for the job is essential when working on modern bicycles. Pedro's flat wrenches provide professional quality, precision fit wrenches required to properly install, remove, and adjust components. Pedro's bottom bracket flat wrenches are made from 4mm thick, precision laser cut, heat-treated tool steel for the ultimate in strength and lasting performance. Working closely with each manufacturer, Pedro's designed each flat wrench to fit perfectly protecting the component and ensuring simple and safe usage for the mechanic. Each ergonomically designed flat wrench also features a single-ended design with cushioned grip to provide maximum leverage & comfort.   Specification The Bottom Bracket Wrench - Shimano 16x39, fits Shimano® XTR BB93 and Dura Ace BB9000 bottom brackets. The Bottom Bracket Wrench - Shimano 16x41, fits Shimano® BBR60 (Ultegra 11-speed 6800 series) and BB-MT800 (DEORE XT M8000 Series ) bottom brackets.