Solid brass body with a hardened steel shackle and a Single locking mechanism. For indoor and outdoor use on minimum to medium security items. 20mm 3 pin cylinder. 30 and 40mm 4 pin cylinder 50 and 60mm 5 pin cylinder. *Single locking only. What's in the box 1 x Matlock 20X10.3Mm Shackle Solid Brass Padlock