Double-ended bottom bracket wrench designed to fit 16-notch bearing cups with an outside diameter of 44mm or 48.5mm Compatible with all current Wheels Mfg bottom brackets with notched cups Machined aluminum, anodized red Bottom Bracket Wrench Red 16-Notch 44mm/48.5mm WRENCH-BB48-44 Wheels ManufacturingUPC/EAN/GTIN: 811079023759