NU-Set 4 X 5373-KA 2-7/8" 73mm Hockey 4 Pieces Hidden Shackle Lock Puck Trailer Padlock Solid Steel 2-7/8, All keyed Same, Polish Chrome Vertical shackle clearance: 9/16 inch Horizontal shackle clearance: 1-3/4 inch Shackle diameter: 13/32 inch Depth clearance: 1-1/8 inch Package includes 4 hidden shackle padlocks, all keyed alike