The Master Lock 5KA2354 laminated steel padlock is a commercial grade keyed alike padlock built for strength and security. It features a 2 inch wide reinforced laminated steel body, a 1 inch tall 3/8 inch diameter hardened boron alloy shackle, dual ball bearing locking for pry resistance, and a non-rekeyable 4-pin W1 cylinder designed to help resist picking. This keyed alike configuration is matched to key number 2354, allowing multiple compatible locks to be opened with the same key.