The American Lock No. A3650 multi-cylinder padlock is one of the most versatile padlocks available. The 1-3/4in (44mm) wide solid brass body, dual ball bearing design and boron alloy shackle provide strong defense against physical attacks and offer superior weather resistance. The quick-change shackle and key-retaining features provide convenience, ease of use and time savings. This single lock body accepts 9 different key-in-knob (KIK) and padlock cylinders, enabling users to streamline service inventories and simplify operations.