Padlock application: for indoor and outdoor use; laminated steel padlock is best used for storage units, sheds, Garages, fences and more. Dual-armor protection: small padlock has a laminated steel core for strength surrounded by brass & zinc outer components for weather resistance. High security application: lock has a 4-pin cylinder for increased pick resistance and a tough-cut octagonal boron-carbide shackle that is 50% harder than hardened steel. Durable design: laminated steel lock has dual ball bearing locking for maximum Pry resistance and a reinforced body bumper for scratch resistance. Specifications: (H x W x D) 7.2 x 4.5 x 2.2 cm; shackle (H x W x D) 2.2 x 2 x 0.8 cm; 1 brass finish padlock; 4 keys., Weight: 0.55336027762 Pounds, Manufacturer: Master Lock