High security locks are designed to withstand the most aggressive physical attacks. Made of extra tough Boron alloy shackle. Triple plated black body has high resistance to rust. High security cylinder with spool pins. Body width is 2 1/2 inches. Shackle diameter is 7/16 inch. Shackle inside height is 1 1/8 inches. Shackle inside width is 7/8 inch. Sold each.