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
AMZCNC Hydraulic Knockout Punch Electrical Conduit Hole Cutter Set KO Tool Kit 1/2 to 4 inch (15T(1/2"-4")) : Amazon.ca: Tools & Home Improvement
Greenlee 7306 Hydraulic Knockout Knock Out Punch Driver Set 1/2" - 2" (R14) | eBay
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
Milwaukee EXACT™ 1/2" to 2" Knockout Set
TEMCo TH0037 4" Hydraulic Knockout Punch Electrical Conduit Hole Cutter Set KO Tool Kit 5 Year Warranty : Amazon.ca: Tools & Home Improvement