Extra security, extra strong, fully shrouded body for additional pry and cut resistance. Steel shackle. Laminated steel body for superior strength. Two nickel plated keys included. Keyheads are covered. 1DEX has 1-3/4 in wide case, 5/16 in diameter shackle, and 25/32 in horizontal shackle clearance. 3DEX has 1-9/16 in wide case, 9/32 in diameter shackle, and 5/8 in horizontal shackle clearance. Black finish.