The BBT-4 is made for the installation and removal of 6-notch SC-S and AC-H cartridge cups used on Campagnolo® Veloce™, Xenon™, Mirage™, Daytona™ and Avanti™ sealed cartridge bottom brackets. These bottom brackets have six notches around the outside of each cup. The handle of the BBT-4 is vinyl coated for comfort.