This top cap tool is most often used to remove the air top cap from modern RockShox forks like the SID, Pike, Lyrik, ZEB and Boxxer.This also works to opentheSID and Paragon dampers as well as to remove SRAM/Shimano cassettes. Compatible with 3/8 inch drive ratchets or torque wrenches and also has 24mm wrench flats. Extra long splinesensure a safeinstallation and correct torque setting.