Features and Benefits:Most Durable Hole Saw. Period.New 3.5 TPI Tooth DesignAll Access Slots enhance user productivity by providing best access and leverage to remove material slugsIncreased Pilot Visibility for Accurate Hole Saw PlacementThermoset Coating reduces friction and drag, increasing overall speed and cordless efficienciesRip Guard(tm) Limited Lifetime Tooth Break WarrantyMade in USAFor use in general purpose applications such as thick/thin metals, aluminum, drywall, plastics, wood, wood with nails1-5/8″ Cutting DepthPlug Jack, an all access slot design for fast plug removalThe MILWAUKEE 3-1/4″ HOLE DOZER Bi-Metal Hole Saws new 3.5 TPI tooth design offers the longest life in metal applications. These HOLE DOZER Bi-Metal Hole Saws feature the industry’s only Lifetime Tooth Break Warranty and take on all general purpose applications, making them the most durable hole saws. Our ALL-ACCESS SLOTS solve the frustration of plug removal for more productivity with less downtime between holes. The new slot design also offers increased pilot visibility for accurate placement and faster chip ejection keeping the cut cool. HOLE DOZER Thermoset Coating allows for faster cutting and is optimized for cordless tools, delivering 25% more holes per charge. Milwaukee HOLE DOZER Bi-Metal hole saws are proudly made in the USA.