Drag Specialties 1 1/2 Handlebar Risers And Top Clamp For Harley The risers and 1-piece top clamp are forged from 6061 T-6 aluminum for superior strength and then CNC-machined for precision fit on handlebars with a 1 1/2 diameter clamping area. They are designed to fit applications with 3 1/2 on-center mounts. They are drilled and tapped for 1/2-13 riser bolts that are sold separately. Features: Available in straight or 1 pullback version Finished in black powder-coat or chrome Sold as kit of two risers, 1-piece top clamp and clamping bolts Tapped for 1/2-13 riser bolts that are sold separately