The Henry 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. Now available in customer focussed packaging: ‘@Work @Home @Leisure’ CRIMESTOPPERS endorsed.Size across case: 45 mm. Shackle clearance Vertical: 20 mm (hardened mild steel).Type: 37.Keyed-alike available.