Hougen 14248 1-1/2" Hougen Sheet Metal Holcutter copperhead-carbide which is especially useful when

which is especially useful when drilling into live electrical boxes

It features a 5/8" bayonet style twist lock shank for fast change out without requirement of any other tools to install in the drill arbor

Using in stainless or other materials significantly reduces the capacity

Hougen Part #: 12117

Hougen 14248 1-1/2" Hougen Sheet Metal Holcutter copperhead-carbide which is especially useful whenHolcutters 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