The ABUS 55 Series Brass Padlocks feature inner components made from non-corrosive materials. They have a pin tumbler cylinder with anti-pick mushroom pins that resist picking, and a hardened steel shackle that resists hacksaw attacks. Padlocks 30mm and above have double bolted construction for increased shackle strength. A long shackle (HB) version is also available. This specific ABUS 55/60 Brass Padlock has the following specifications: ABUS Security Level: 6. Keyed Alike Key Reference: 5601. Shackle Width: 32mm. Shackle Height: 32mm. Shackle Diameter: 8mm. Overall Width: 58mm. Overall Height: 84mm. Overall Depth: 16mm.