All punches boxed singly without key, which should be ordered separately (Key Type. 10mm hexagonal wrench)

To use these punches they require a hole to be drilled through the sheet metal (large enough to clear the heagonal Screw) then the Die and hexagonal screw are threaded through the sheet metal then onto the die nut and screw die nut. When the hexagonal screw is tightened the punch will cut cleanly and evenly through the metal