1-3/4'' wide 4-pin tumbler. Tough, laminated cadmium rustproofed steel case with case-hardened steel shackle. Shackle diameter 5/16''. Clearance: Horizontal 3/4'', vertical 15/16''. Dual steel locking levers independently lock each shackle leg for increased protection. Removable key-change number for added security. 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. No. 1: Keyed different, boxed No. 1KALJ: 2-1/2'' shackle, keyed alike, boxed No. 1KA Series: Keyed alike, boxed No. 1D: Keyed different No. 1LJ: Extra length, 2-1/2 shackle clearance, 1 per box No. 1DLJ: Extra length, 2-1/2 shackle clearance No. 1TRILJ: Extra length, 2-1/2 shackle clearance, 3 pack keyed alike