Caliper Mount - M8 ST '18+ Allows for installation of radial caliper to the rear of a performance Bagger/Softail, Prevents clutch slippage resulting from motor upgrades, Machined out of 6061 aluminium, Available in raw finish, Made in the U.S.A., Does not fit stock swingarm; designed specifically for use with the Trask Assault swingarm (part 301-0159) sold separately