CNC billet aluminum construction. For handlebars with a 1" (25.4mm) clamping diameter. With a one-piece top clamp with a 8-bolt clamping system. Fit models with 3.5" center to center triple tree mount holes. The one-piece top clamps combined with the 8-bolt clamping force is a great set-up for to help combat riser twisting forces with wide bars and help prevent handlebars rotating in the risers. This additional ''torque & twist resistance'' is great for higher and wider handlebars. 12-13 threaded. With a low 1.5" (3.8cm) rise and designed to give ultimate strength. Complete with stainless top clamp bolts.