Milwaukee HOLE DOZER™ 3-1/4" 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 increases the strength and lifespan of the teeth while improving hole quality. This hole saw also includes Plug Jack™, an all-access slot design that boosts productivity by making plug removal quicker. For thick material applications, Plug Jack™ provides access lower in the cup, and for thin materials, it access higher toward the teeth. When you need quick, tool- change-outs, Milwaukee’s universal Quick-Change Arbor makes the process fast and easy. Model Number: 49-56-0183