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Greenlee 7235BB Slug-Buster 1/2" - 1-1/4" Manual Knockout Set for Use with KRW-1 High-Leverage Ratchet Wrench, Hole Punching Knockout Kit : Amazon.co.uk: DIY & Tools
GREENLEE, 6 Pieces, 10 ga Max Sheet Metal Capacity-Steel, Knockout Punch Driver Set - 5C632|7238SB - Grainger
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Greenlee Mild Steel Punch 12.5mm | Klauke Slug-Buster Knockout Punch System ISO 12 - The Cable Tooling Company
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