Milwaukee HOLE DOZER™ 3-1/2" Bi-Metal Hole Saw is made in the USA and features RIP GUARD™, the industry’s strongest tooth form. The bi-metal construction with 8% cobalt enhances the strength and lifespan of the teeth while improving hole quality. This hole saw also includes Plug Jack™, an innovative all-access slot design that boosts productivity by making plug removal faster and easier. For thick materials, the Plug Jack™ provides access lower in the cup, and for thin materials, it access higher towards the teeth. Additionally, the Milwaukee universal Quick-Change Arbor allows for quick, tool- change-outs, making this hole saw a versatile and efficient choice for your cutting needs. Model Number: 49-56-0193