I have a Blackhawk 1/2" Punch Die Set Conduit Knockout Z1038/Z1039 that is in excellent condition. The Blackhawk 1/2" Punch Die Set (models Z1038/Z1039) is a USA-made, heavy-duty manual conduit knockout punch designed to create precise 7/8-inch (22.5mm) holes for 1/2-inch electrical conduit. It is typically used with a wrench or socket to punch through mild steel or aluminum electrical boxes. $15
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