The Master Lock #6230KALH ProSeries solid body padlock, keyed alike, multiple locks open with the same key, features a 2-1/2 in round wide solid steel body and a 1-7/8 in tall, 7/16 in Dia hardened boron alloy shackle for superior cut resistance. Chrome rust-proofing provides longer life and a dual ball bearing locking mechanism resists pulling and prying. Ideal for industrial and construction applications, the high-security, rekeyable five-pin cylinder with spool pins is virtually impossible to pick.