General description UNIOR BOTTOM BRACKET SOCKET BB9000 is a precision CNC machined tool designed for the installation and removal of various external bottom bracket cups. Made from aluminum billet and anodized in red, it offers a durable finish and a precise fit that prevents damage to aluminum external bottom bracket cups. Technical specifications Material: Aluminum billet Finish: Anodized red Drive type: 1/2" square drive Usage Ideal for installation and removal of external bottom bracket cups Knurling on the side provides better grip for manual threading Compatible with torque wrenches, ratchets, and fixed handles