You are buying a "Gorilla Grabber" Anti-Slip Handlebar 1 piece top clamp for 2015 and Newer Harley Road Glide models. We designed this clamp and use it on custom bikes that we build for our local customers. The clamp virtually eliminates handle bar slippage when using taller handlebars. Can be used with OEM lower risers with stock riser bolts. Designed for handlebars with a 1 1/4"" diameter riser clamping area. Included Allen Head set screws lock handlebars into place. Made in U.S.A. of CNC Billet Aluminum.