The Trimax THPXL takes the basic hidden shackle padlock (also sometimes called a hockey puck lock) to a new level for protecting cargo trailers. Often with the standard hidden shackle lock, the tabs on the door are too wide or too spread apart, so Trimax made the THPXL almost 1/4" thicker to allow 1/4" deeper. The height if the pocket was enlarged 5/8" to 13/16". There isn't a door hasp this lock won't fit! Use with the Shackless Padlock (62-0561). Three chrome bolt hole design. Two pieces. Is rekeyable, easy to duplicate, and a great value in a high security lock.