Thin Flange Bottom Bracket Socket Pro Kit These sockets are designed to create a tight grip on thin flange bottom brackets to avoid slipping while torquing cups into bike frames. These single-sided sockets are used for installing and removing 48.5mm 16-notch, 52mm 16-notch and 50mm 12-notch bottom bracket cups.

• Machined 3/8" drive, which can be used to allow 3/8" drive torque wrenches to be attached and threaded onto 1/2 inch UNC press rod
• Machined 6061 aluminum
• Anodized red