Wheels Bottom Bracket Socket Tool. Features: Double sided socket tool for installing and removing both 48.5mm and 44mm 16-notch bottom bracket cups Socket is machined for 1/2" drive, 3/8" to 1/2" adapter is included so torque wrenches can be used Compatible with all Wheels Mfg bottom brackets Machined 6061 aluminum in anodized red Made in the USA Specs: Description:bottom bracket socket tool, BBTOOL-48-44 Remarks:Includes socket head screws (25) M4x10, (25) M4x12, (25) M4x16, (15) M4x20, (25) M5x12, (25) M5x16, (25) M5x20, (15) M5x25, socket head cap: (25) M6X12, (25) M6X16, (25) M6X20, (25) M6X25