Keyed Alike - order multiple locks to open with the same key or order to match other locks with the W6000 cylinder ProSeries Padlocks are designed for Commercial/Industrial applications 1-9/16in (40mm) wide solid brass body provides extra resistance in caustic, corrosive environments 1-1/16in (27mm) tall, 1/4in (6mm) diameter hardened boron alloy shackle for superior cut resistance Dual ball locking mechanism resists pulling and prying