Hougen 14005C Holcutter Kit Includes: Arbor, Pilots, Hex Washer, instructions, and HSS Holcutters: 7/8, 1-1/8, 1-3/8, 1-3/4, 2 & 2-1/2" Holecutter Arbor Titanium Nitride (TiN) is a

Titanium Nitride (TiN) is a multi-purpose coating which increases chip flow in softer materials

center punch extra pilots in a plastic storage case

Hougen Part #: 12122

The heat and hardness resistance allows the tool to run at higher speeds than uncoated tools

Hougen 14005C Holcutter Kit Includes: Arbor, Pilots, Hex Washer, instructions, and HSS Holcutters: 7/8, 1-1/8, 1-3/8, 1-3/4, 2 & 2-1/2" Holecutter Arbor Titanium Nitride (TiN) is aHolcutters 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