Hougen 14009 Arbor (3/8" Chuck) for Quad-Lead Threaded Cutters includes pilot & hex washer 75002.5PR Kit includes cutters of size

Kit includes cutters of size 1/4"

COUNTERSINK-CARBIDE 82 W/INSER

annular cutters

It is commonly used on high tensile alloys

Hougen 14009 Arbor (3/8" Chuck) for Quad-Lead Threaded Cutters includes pilot & hex washer 75002.5PR Kit includes cutters of sizeHolcutters 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