2-1/8" Sheet Metal Holcutter Quad Lead 1/8" DOC 14266 6581430 koken 3/4"dr deep socket -

koken 3/4"dr deep socket - 12 point - 26mm single item

This tool was the subject of some innovations allowing more comfort

koken 3/4"dr impact socket - 6 point - 13/4" single item

Stainless steel

2-1/8" Sheet Metal Holcutter Quad Lead 1/8" DOC 14266 6581430 koken 3/4"dr deep socket -The 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