The ERA Close Shackle Padlock has a 5 brass lever locking mechanism with a close hardened steel shackle. Master keying of this product is available. Doors up to 63mm thick can be secured when used in conjunction with the ERA Narrow Style Security Locking Bar. This locking bar is manufactured from heavy malleable iron castings for maximum strength. The hardened forged-steel hasp conceals the staple to prevent hacksawing and forced wrenching.