Greententljs 1 Inch Barbell Clamps - Quick Release Pair of Locking 1'' Diameter Standard Bar Weight Plates Collar Clips for Workout Weightlifting Fitness Training Bodybuilding nylon/steel/rubber 100% Brand New,The Inner Diameter Size:28.05 mm(1.105 inch), The Inner Spring Diameter Size:22.35 mm - 26.67 mm(0.888 Inch -1.050 inch)........PLEASE NOTE THE SIZE(1'',1 INCH,25MM BARBELL CLAMPS),Locking 1 inch bars Material:reinforced plastic ,ABS (HIGH Quality:Nylon 662),Package Include:Pair of 1 Inch Barbell Clamp(2 unit) This barbell clamp fits for 1 inches standard size.Perfect for crossfit workouts,standard lifts,overhead press,deadlifts,bench press,or any other workout using 1 inches standard barbell. Satisfaction Guaranteed: If you're unsatisfied with our 1 inch standard barbell clamp, simply return them via Amazon's no hassle returns Easy to use, one hand install ~ Spring powered,These collars are a favorite for crossfit and many other commercial gyms.