A Thin Flange Bottom Bracket Socket designed to create a tight grip on thin flange bottom bracket to avoid slipping while torquing cups into bike frames.This single-sided socket is used for installing and removing the following 16-notch, 52mm bottom brackets: SRAM T47, CeramicSpeed T47, C-Bear T47, Enduro T47, White Industries T47, Kogel T47 and Campagnolo T47 featuring 16-notch 52mm bottom bracket cups. The socket has a machined 3/8" drive, which can be used to allow 3/8" drive torque wrenches to be attached and locks onto 1/2" UNC press rod for secure and easy installation of thin flanged bottom brackets.Features:Machined 6061 Aluminium Anodized Red