A highly durable metal tool to remove and install shimano hollowtech 2 integrated bottom brackets and chainsets16 laser cut splines securely engage the notches of the bottom bracket cups while the other end fits the 8 internal splines of the crank arm adjustment capplastic coated handle for a secure and comfortable gripwarning this tool has a long handle and it is possible to damage the tool or the component by overtightening during installationrecommended torquesetting for bottom bracket cups