1-1/8" wide. 4-pin tumbler security. Tough, laminated, cadmium rustproofed steel case, nickel-plated shackle, 3/16" diameter. Shackle clearance: Vertical 9/16" horizontal 1/2". Removable key-change number for added security. Dual locking levers provide pry resistance. Patented guard plates and 4-pin cylinder to resist attempts at rapping and picking to open locking lever. 2 brass keys. Only SKUs with KA in the model number are keyed alike padlocks and all item ordered from that SKU number would be keyed alike to the 4-digit key number shown in the product description.