The coated Excell® padlock Master Lock No. M15BEURDLF features a 64 mm wide housing made of coated steel for maximum strength and reliability, surrounded by exterior components made of brass and zinc for weather resistance. The octagonal shackle, with a diameter of 11 mm, is 38 mm long and made from Tough-Cut™ boron carbide, which is 50% harder than hardened steel and provides maximum resistance against cutting and sawing. The 5-pin locking cylinder prevents lock picking, while the two ball bearing locking mechanisms protect against forced entry or smashing. The lifetime limited warranty gives you the assurance of a brand you can trust.