Easy-to-grip, dome-shaped dial with slick metallic finish Strong, die-cast zinc construction. Hardened steel shackle for extra cut resistance. Shackle diameter measures 9/32in. with a 11/16in. shackle clearance top to bottom and 13/16in. side to side. Master Lock(R) Portable Storage Lock, Black is one of many Security available through Office Depot. Made by Master Lock.