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Tempo Greenlee 7235BB Slug-Buster Manual Knockout Kit for 1/2 to 1-1/4-Inch Conduit - 1/2" to 1-1/4" : Amazon.ca: Tools & Home Improvement
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Greenlee 7238SB Slug-Buster Knockout Kit with Ratchet Wrench, Grey & Green, Full Size : Amazon.ca: Tools & Home Improvement
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Gardner Bender Slug-Out Knockout Set for 2-1/2 inch (6.35 cm) Conduit, Includes Punch, Die, and Drive Screw in the Knockout Punch Sets department at Lowes.com
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