IBOSAD Hydraulic Knockout Hole Punch Driver Kit 1/2 to 2 inch Electrical Conduit Hole Cutter Set KO Tool Kit Metal Sheet Puncher : Amazon.ca: Tools & Home Improvement
Greenlee 7907SBSP SPEED PUNCH Conduit Knockout Punch Kit, 0.5 to 2" conduit size, 10 gauge maximum capacity
GREENLEE Hydraulic Knockout Punch Set | Meunier Outillage Industriel