These chassis punches are another approach to cutting large holes in thin material. They only work in sheet metal up to around 1.5mm thick (16 gauge). You drill an initial hole just big enough for the screw to fit through, then crank the die and punch together to cut the desired hole. Commonly used by electricians to cut holes in electrical boxes.
Location: Box 38
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!
