The OnGuard Bull Mastiff Key Padlock provides rugged, everyday security with a laminated-steel body and a thick 10 mm hardened-steel shackle that resists cutting, prying and twisting. Its precision brass lock core delivers smooth, dependable key action, while the non-marring bumper protects surfaces from scratches or dents. Ideal for gates, sheds, storage units, toolboxes, trailers and cable locks, this padlock includes five heavy-duty F-style keys for convenience and long-term reliability.