Round Steel Padlock Extra long shackle Corrision resistance Chrome plated Dual ball bearing locking mechanism 4-pin tumbler cylinder Size: 54mm Tessi 54Mm Round Steel Padlock | Mlm830dlh Excell Padlocks are packed full of extra tough features and patented technology. This 54mm die cast zinc padlock is chrome plated to deliver corrision resistance and has a dual ball bearing locking mechanism, which makes this padlock extra tough to pull/pry open. It has a resilient 4-pin tumbler cylinder and a patented octagonal boron-carbide shackle, whch is exceptionally hard to cut. The shackle is also extra long enabling use in a wider range of applications.