The ABUS 55 Series Brass Padlocks have inner components made from non-corrosive materials. Pin tumbler cylinder with anti-pick mushroom pins which resists picking, a hardened steel shackle which resists hacksaw attacks and double bolted 30mm and above for increased shackle strength. Long shackle (HB) version available.This ABUS 55/25 Brass Padlock has the following specification: ABUS Security Level: 2. Shackle Width: 12mm.Shackle Height: 11mm.Shackle Diameter: 4mm. Overall Width: 24mm.Overall Height: 38mm.Overall Depth: 10mm.