After years of research and testing Park Tool have built what it considers the best shop clamp madeIt's smooth, versatile and built to stand up to everyday shop useCam-actuated adjustment system for quick entry, adjustment and exitFully adjustable clamping pressure prevents damage to thin-walled tubesHandy spinner handle speeds large size range adjustmentsGrips nearly any tube from 7/8 inches to 3 inches (23-76mm), including aero tubesNarrow clamping jaws (2.7 inches / 7 cm) fit into tight areas or on short seat postsPrecision machined, die-cast aluminium main body parts and high quality small partsDurable powder coat finishSoft, durable composite rubber jaw coversSaddle cradle provides a perfect spot to temporarily rest a bikeMade in the USA and covered by Park Tool's legendary limited lifetime warranty