GREENLEE, 6 Pieces, 10 ga Max Sheet Metal Capacity-Steel, Knockout Punch Driver Set - 5C632|7238SB - Grainger
GREENLEE, 10 ga Max Sheet Metal Capacity-Steel, Falls Free, Round Knockout Punch Kit - 3UME6|735BB - Grainger
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Temco Hydraulic Knockout Punch Th0004 - Electrical Conduit Hole Cutter Set Ko Tool Kit 5 Year Warranty : Amazon.co.uk: DIY & Tools
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