The Park Tool BBT-9 puller is used to remove and install Shimano®, Hollowtech II®, Campagnolo® Ulta-Torque™, and many other external bearings crankset bottom brackets. Also used to remove and install Shimano® and Hollowtech® crank arm adjustment caps of 8 internal splines.The Park Tool BBT-9 bottom bracket bike puller is made from a highly durable metal. Caution, this tool has a long handle and therefore it is possible to damage the tool or the components by overtightening during installation. The tool fits cups and lockrings with 16 external notches and an outer diameter of approximately 44mm.