Product details:

These risers are forged from 6061-T6 aluminum for superior strength. Drilled and tapped for 1/2in.-13 riser bolts (bolts sold separately). CNC-machined for precision fit on handlebars with a 1in. diameter clamping area. Designed to fit applications with 3.5in. on-center mounts and will accept most OEM-style top clamps.