Padlock application: for indoor and outdoor use; laminated steel padlock is best used for storage units, sheds, Garages, fences and more Dual-armour protection: small padlock has a laminated steel core for strength surrounded by stainless steel and zinc outer components for weather resistance Very high security application: lock has a 4-pin cylinder for increased pick resistance and a tough-cut octagonal boron-carbide shackle that is 50 percent 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) 9, 1 x 5.2 x 3.1 cm; shackle (H x W x D) 3.8 x 2.4 x 0.9 cm; 1 padlocks; 4 keys