Thin Flange 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 installationCompatible with all Wheels MFG and some MegaEXO bottom brackets with 16-Notch 48.5mm spline patternsBottom Bracket SocketRed16-Notch48.5mmBP0018Multiple3/8`UPC/EAN/GTIN: 811079027221