The BBT-4 is made for the installation and removal of 6-notch SC-S and AC-H cartridge cups used on 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. The major diameter of the tool is nominally 44mm, and the minor diameter 38mm.
WARNING: California Proposition 65
This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.