Features and Benefits:Most Durable Hole Saw. Period.;New 3.5 TPI Tooth Design;All Access Slots enhance user productivity by providing best access and leverage to remove material slugs;Increased Pilot Visibility for Accurate Hole Saw Placement;Thermoset Coating reduces friction and drag, increasing overall speed and cordless efficiencies;Rip Guard™ Limited Lifetime Tooth Break Warranty;For use in general purpose applications such as thick/thin metals, aluminum, drywall, plastics, wood, wood with nails;1-5/8" Cutting Depth;Made in USA;The MILWAUKEE® 4-1/2" HOLE DOZER™ Bi-Metal Hole Saw with Arbor has a new 3.5 TPI tooth design that offers users 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.