13/16" Sheet Metal Holcutter Quad Lead 1/8" Doc 14226 7008120 The hollow punches are screwed

The hollow punches are screwed on the handle-chuck easily thanks to the spur system and can be paired to cut a ring in a single operation with a concentric cutting

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Product Type: Spark Plug Wire Sets

Includes 10mm

13/16" Sheet Metal Holcutter Quad Lead 1/8" Doc 14226 7008120 The hollow punches are screwedThe Holcutters, are not hole saws. They're precision ground, heat treated tools that easily cut thru the stock rather than ripping, tearing, and pushing thru as do typical hole saws. They can produce holes three times faster and cleaner than hole saws in sheet metal and have dramatically extended tool life too. All sizes have a "shoulder" to prevent plunge thru, which is especially useful when drilling into live electrical boxes. See for yourself why