Description Professional DesignThe bottom bracket wrench has stable characteristics and high reliability, specially designed for mountain bike and road bike hollow bottom bracket disassembly. Material The bicycle bottom bracket wrench is made of upgraded aluminum alloy, high hardness, strong and durable, with long service life. Common TypeOur bottom bracket wrenches are suitable for to most bottom bracket types on the market, typically the type used for any bike with the series Closed LoopThis wrench uses a closed loop design, in case you dont have no need to worry about aperture deformation. The straight tooth-shaped design makes it have a high bite rate. Fine workmanship Through the precise process of wire cutting and glazing and polishing, the bicycle key is firmly engaged during the cycle. use and the teeth are not easy to slip, which protects the bottom bracket well. Professional design The bottom bracket wrench has stable characteristics and high reliability, specially designed for disassembling hollow bottom bracket of mountain bike and road bike. Material The bicycle bottom bracket wrench is made of upgraded aluminum alloy, high hardness, strong and durable, with long service life. Common Type Our bottom bracket wrenches are suitable for most bottom bracket types on the market, usually the type used for any bike with the PROWHEEL series 1 . BB44: This is the most common key type. Most bottom brackets on the market of this specification For BB51 / BB52 / BB70 / BB71 / RS500 / MT500 For SRAM GXP series For PROWHEEL Series Support Wrench For IXF Series And most 44mm OD available on the market 2. BB46 For SRAM DUB Thread Bottom Bracket Special Wrench Features: Closed-loop design prevents opening deformation, drop rate high use of tooth-shaped flat straight bite High-strength aluminum alloy material - high hardness Tight bite, not easy to slip, aluminum alloy frosted and polished aluminum, precision wire cutting, no damage to the central axis