Drag Specialties 1 Handlebar Risers For Harley Features: These risers are forged from 6061 T-6 aluminum for superior strength They are drilled and tapped for 1/2-13 riser bolts (bolts sold separately) CNC-machined for precision fit on handlebars with a 1 diameter clamping area These risers were designed to fit 3-1/2 on-center mounts and will accept most OEM-style top clamps Pullback style risers have 1 of pullback