ABUS 72 Series Coloured aluminium padlocks with a precision extruded, cut and drilled pure aluminium body which is light and strong. Rust-free precision 6-pin tumbler cylinder with a 40mm hardened 7mm steel shackle. Zinc plated brass lock mechanism to protect against chemical corrosion. These anodised aluminium padlocks are keyed alike and ideal for access lock-off with 801 shackles, also ideal for Doors, gates, cabinets, lockers, toolboxes, cellar windows, sheds, switchgears, barriersSelf-locking: lock is locked by pushing down the shackle.