The ABUS 55 Series Brass Padlocks have inner components made from non-corrosive materials. Features a pin tumbler cylinder with anti-pick mushroom pins, a hardened steel shackle that resists hacksaw attacks, and double bolted 30mm and above for increased shackle strength. A long shackle (HB) version is available. Specifications: ABUS Security Level: 4 Keyed Alike Key Reference: 5401 Shackle Width: 21mm Shackle Height: 22mm Shackle Diameter: 6.5mm Overall Width: 38mm Overall Height: 60mm Overall Depth: 13mm