Tailored to fit any standard Olympic barbell, the ETHOS(R) Lock-Jaw Olympic Barbell Collars make it safe and easy to load plates and keep them in place as you work towards your lifting goals. Secure, Safe Weightlifting Securely positions weight plates for rigorous use Integrated grip pads with easy to operate Lock Lever makes it simple to change plates Quality Construction Solid nylon injected molded frame for durability Tailored to fit any Olympic size barbell Additional Details Includes one pair Dimensions: 3.5'' L x 3'' W x 2'' H Weight: 13 oz. per pair Click here for additional information relating to the Manufacturer's Warranty.