The Master Lock No. 5D Laminated Padlock features a 2 inch (51 mm) wide laminated steel body for maximum strength and reliability. The 3/8 inch (10 mm) diameter shackle is 1 inch (25 mm) long and made of hardened boron alloy, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. Pin tumbler security5T: Keyed alike, 2 per cardDual ball bearing locking for maximum pry resistance2 brass keys2" wide laminated case1" vertical and 15/16" horizontal clearances5D: Keyed differently, carded5KA A389: Keyed alike to A389, boxed5KA A116: Keyed alike to A116, boxed5KA A451: Keyed alike to A451, boxed