We machine our Compensator Eliminator Bolt Kits from Aircraft quality steel so they will hold up to the large amount of torque this bolt calls for. Black-oxide coated for corrosion resistance. Laser engraved with our Logo so you know you are getting our U.S.A. made quality! A Bolt kit must be purchased to install our Compensator Eliminators on ’11 and later Big Twin. Also recommended for ’07-’10 Big Twin (Also ’06 Dyna).