2 in wide 4-pin tumbler. Tough, laminated, cadmium rustproofed steel case; special alloy steel shackle. Shackle diameter 3/8 in Dual steel locking levers independently lock each shackle leg for increased protection. Removable key-change number for added security. Shackle clearance: Horizontal 15/16 in ; vertical 1 in Comes with 2 brass keys. Numbers following KA in pricing designates key number. All items ordered from that SKU number would be keyed alike to that number.