Increased leverage allows full advantage of stock/aftermarket brake caliper OEM switch housings and CANbus wiring compatible 1" bar clamping diameter Twist adjuster easily modifies lever distance from handlebar CNC machined from billet aluminum Lever surface shape designed for comfortable and smooth quality 9/16" bore for single disc applications Mounting hardware included Machined RSD logo; ; Note: Front brake light switch not supported on 2014 and up HD Touring models