20 Piece, 4" Punch Hole Diam, Hydraulic Knockout Set
154 1/2" - 4" Standard Hydraulic Knockout Set - Current Tools
VEVOR Hydraulic Knockout Punch 6 Die 10 Ton, Holesaw Set Cutter Tool, Saw Electrical Conduit Metal Drill, 1/2" to 2" Hand Tool Cutter Driver Kit Conduit Knockout Set - Walmart.com
TEMCo 4" HYDRAULIC KNOCKOUT PUNCH Electrical Conduit Hole Cutter Set KO Tool Kit | eBay
Amazon.com: AMZCNC Hydraulic Knockout Punch Electrical Conduit Hole Cutter Set KO Tool Kit 1/2 to 4 inch (15T(1/2"-4")) : Tools & Home Improvement
VEVOR 10 Ton Hydraulic Knockout Punch Driver Kit Hole Tool 1/2 in. - 2 in. with 6 Dies S10T240CR16MM3UYFV0 - The Home Depot