Thin Flange T47 Bottom Bracket Socket Designed to create a tight grip on thin flange bottom bracket to avoid slipping while torquing cups into bike framesFeatures a machined 3/8` drive, which can be used to allow 3/8` drive torque wrenches to be attached and locks onto 1/2 inch UNC press rod for secure and easy installationSingle-sided socket is used for installing and removing 52mm, 16-notch bottom bracket cupsBottom Bracket SocketRed16-Notch52mmBP0019SRAM T473/8`UPC/EAN/GTIN: 811079027252