The Squire Stronglock Laminated Padlocks are a medium to high security durable padlock, with a hardened steel shackle with a covered steel padlock body with anti corrosion finish. The 4-pin tumbler lock mechanism gives over 1,000 key variations. Recommended for sheds, garages, lockups, gates, greenhouses, toolboxes, lockers etc. Keyed alike and masterkeyed available to order. CRIMESTOPPERS endorsed.Long shackle steel padlock ideal for sheds, garages, lockups, gates, toolboxes and lockers. Specification:Shackle diameter: 7.0mm.Vertical shackle clearance: 39.0mm.Horizontal shackle clearance: 16.0mm.Shackle: hardened mild steel.Type: 4-pin tumbler. Keyed-alike available.