The oversized 35 mm clamp diameter offers increased strength and minimal weight;6061-T6, 3D, forged alloy construction;Laser-etched calibration marks make dialling in the perfect angle simple and repeatable;Compatible with both Knock Block and standard head sets and spacers;Knock Block system protects frame from impacts from over-rotation of bars and fork crown;Available in a wide range of sizes for today's mountain rider;High-strength, corrosion-resistant steel bolts;Approved for carbon bars;