Made in the USA, the Milwaukee® Hole Dozer™ Hole Saw features Rip Guard™, the strongest tooth form in the industry, backed by the Rip Guard™ limited lifetime tooth break warranty. Each tooth is built with more steel behind the cutting edge for added strength. The Rip Guard™ warranty on tooth breaks is a first for the hole saw industry. The added tooth strength along with 8% cobalt give added life to the teeth, allowing for increased productivity on the jobsite, as well as continued hole quality. The Hole Dozer™ includes Plug Jack™, an all access slot design that allows for full access during plug removal. The Plug Jack™ gives access lower into the cup for thick material and higher towards the teeth for thin material. With multiple positions to apply leverage and better plug access, Plug Jack™ increases productivity and eliminates wasted downtime between holes. For fast, tool-free change-outs, use Milwaukee® universal Quick-Change Arbors. Milwaukee® HOLE DOZER™ Hole Saw, 2-1/8 in Dia, 1-5/8 in Cutting Depth, 3.5 TPI, 3/8 in Arbor, Bi-Metal/8% Cobalt Cutting Edge, Carbon Steel Body, Toothed Cutting Edge, 240/105/160/80 RPM, Use Arbor: 49-56-7210/49-56-7240/49-56-7250 and 49-56-9100, Applicable Materials: Aluminum, Cast Iron, Mild Steel, Sheet Metal and Stainless Steel