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Greenlee 0.642 Inch Hole Diameter x 0.769 Inch Hole Length x 16.3mm Wide, Double D, Knockout Punch Unit Hydraulic and Manually Operated, 14 Gauge Max in Mild Steel 61086 - 04225496 - Penn Tool Co., Inc
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Greenlee - 229 - Electronic D-Sub Mini Connector Panel Punch,9 Pin Connector,Manual or Hydraulic - RS
GREENLEE, 14 ga Sheet Metal Capacity (Steel), 3/4 in Nominal Size, Knockout Punch and Die Kit - 4JA56|61007 - Grainger
50124749 Greenlee | Greenlee Punch and Die Tool, 43.4 x 12.9mm, 25 Way D F, Hydraulic Operation | 477-8729 | RS Components
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