These risers are forged from 6061-T6 aluminum for superior strength 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 Designed to fit applications with 3.5" on-center mounts and will accept most OEM-style top clamps with offset mount holes Available in chrome or black finish Sold in pairs