The Kennedy® variable pitch hole saws deliver high quality holes in a range of materials, including wood, steel, brass, bronze, and cast iron. The M3 HSS cutting teeth aggressively cut to give a very smooth finish with little to no tear out. Features and Benefits • Cuts up to 40% faster than constant pitch saws • Varying tooth pitch disrupts harmonics to substantially reduce noise • Tooth life is extended when used in conjuction with a cordless drill Typical Applications • Construction • Engineering • Maintenance Notes • 4-6 teeth per inch • 28.5mm (11/8") cutting depth