LMX53 Crossmaxx® Fast lock collarset 50 mm The LMX53 Crossmaxx® Fast lock collarset is the ideal solution for anyone looking to secure weight plates quickly and safely during training. These collars are suitable for all smooth Olympic barbells with a 50 mm diameter. Each collar measures 7.6 x 8.9 x 5.0 cm. Thanks to the unique non-slip, quick-locking mechanism, plates can be changed in one swift motion—without compromising safety or stability. The fast lock design also prevents damage to Olympic bars. The set is supplied as a pair (2 pieces), making it perfect for both home gyms and professional training environments.