Solid brass body and multi-pin tumbler mechanism. Chrome-plated, hardened steel shackle. Includes 3 brass keys. Horizontal x vertical shackle clearance: MSS01: 10x15mm; MSS02: 15x18mm; MSS03: 23x24mm; MSS04: 28x31mm. MSS05: 33x40mm. Shackle dia: MSS01: 3.5mm; MSS02: 5mm; MSS03: 6mm; MSS04: 8mm; MSS05: 9.5mm.