LIFETIME WARRANTY - Genuine Lock-Jaw Barbell Collar UNMATCHED DURABILITY - Advanced Composite Reinforced Resin Construction - Strongest, most durable collar available on the market UNRIVALED HOLDING POWER - No rattling or sliding plates. Barbell clips will secure your plates together set after set, drop after drop m bars and all lifts FAST, EASY LOCK AND UNLOCK - Effortlessly clamp and remove with one hand using the over-sized latch DESIGNED FOR ALL LIFTS - Bumper Plates, Olympic-Style, Deadlifts, Bench Press, Powerlifts, Clean and Jerks, Overhead Press, HIIT, Training, Competition, and Powerlifting QUICK CHANGE WEIGHTS - Quick release lever makes it a snap to swap out weights FITS BOTH 2" AND 50mm BARS - The two most popular Barbell sizes including Olympic barbells US Utility Patent US7513856 B2