This hole punch kit equips you with the ability to punch holes through thick metal. It includes seven punch and die accessories for various applications and sizes. The hole puncher has a 1/4" opening and 1-3/4" throat depth. The sizes included are: 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", and 9/32". Its also very easy to set up and operate.