Gardner Bender 4-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 0.135 in. in thickness. Punches and dies are interchangeable， in any combination， with most brands of knockouts. This kit includes punch， die， drive screw and drive nut to punch a hole diameter sufficient for 4 in. pipe/conduit; actual hole diameter is of 4.545 in. Additional sizes are available to specifically permit fast and easy installation of electrical conduit and pipe of nominal sizes 1/2 in. through 4 in.， in all commonly available increments.
4-point punch design allows slug to fall free from the die without splitting， tapping or prying
Interchangeable with most tool brands
Punches 10-Gauge mild and 12-Gauge stainless steel
Punches hole designed for 4 in. pipe or conduit
Actual hole diameter 4.545 in.
Set includes punch， die， drive screw and drive nut
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