Thanks to its shackle protection as well as its special cylinder with security key this padlock is hardly conquerable and therefore provides highest security padlock body is made from polished brass with a hardened steel shackle size w x h x l 40 x 65 x 22 mm shackle diam 7 mm shackle height clearance 25 mm shackle width clearance 18 mm 3 keys are included which cannot be copied