Engineered and built to accurately face front or rear disc brake mounts so they are precisely aligned to the rotor \n Faces any IS mount, post mount or new Shimano flat mount, including low clearance, chainstay mounts \n Telescoping axle adapters allow use with any configuration of open or thruaxle dropouts and dropout widths (including Boost 110, Boost 148 and all FatBike axles) \n Made of precision machined parts \n Includes two facing cuttersone for IS mounts and one for post and flat mounts as well as storage case \n Part 2197/Diamond Abrasive Adapters also available to allow for easier facing on carbon fiber frames only