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Greenlee 7625 HYDRAULIC PUNCH DRIVER, Case accommodates 1/2" - 2" conduit size knockouts (hole size: 0.89" - 2.42" or 22.5 mm - 61.5 mm) - Hand Tool Knockout Punches - Amazon.com
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Greenlee 7211BB-1/2 Slug-Buster Knockout Punch Unit, 7/8-Inch - Hand Tool Knockout Punches - Amazon.com
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Greenlee 28154 Slug-Splitter Self-Centering Knockout Punch, 7/8-Inch Hole - Hand Tool Knockout Punches - Amazon.com
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