Gardner Bender four-point knockout punches and dies are designed to punch clean, round holes through 10-gauge mild steel, 12-gauge stainless steel or other soft metals up to .135 inches in thickness. Punches and dies are interchangeable, in any combination, with most brands of knockouts. This assortment kit includes one Punch and Die pair in each size: 2.5", 3", 3.5" and 4" for a total of 8 pieces (4 Punches and 4 Dies) in a durable metal flip-lock storage case. Additional kits and individual punch and die sizes are available from GB to specifically permit fast and easy installation of electrical conduit and pipe in all commonly available increments.
