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 2-1/2". Dual steel locking levers independently lock each shackle leg for increased protection. Removable key-change number for added security. Comes with 2 brass keys. Only SKUs with KA in the model number are keyed alike padlocks and all items ordered from that SKU number would be keyed alike to the 4-digit key number shown in the product description.