Milwaukee 49-56-9005 2-1/4-Inch Big Hawg Hole Cutter
The Milwaukee Big Hawg's Aggressive Tooth Geometry drills 10 times faster than hole saws.  The innovative three tooth design allows you to drill up to 600 holes without resharpening.  The deep gullets and reduced pilot bit shank deliver easy plug removal saving you time and money.  The Milwaukee Big Hawg's hardened steel teeth provide maximum durability against unintended nail impacts.