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164PM 1/2" x 4" Piece Maker™ Drill Driven Knockout Set - Current Tools
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Milwaukee 49-16-2695 EXACT™ 2-1/2" to 4" Knockout Set - BC Fasteners
CURRENT TOOLS Punch Driver Knockout Set - Drill Driven Holemaking Driver Set with Piece Maker Punches & Dies - 162PM : Amazon.ca: Tools & Home Improvement