Milwaukee HOLE DOZER™ 4" Bi-Metal Hole Saws, 9-Pack are proudly made in the USA and designed to deliver exceptional performance and durability. Featuring RIP GUARD™, the industry’s strongest tooth form, these hole saws provide superior cutting strength and longevity. The bi-metal construction, enhanced with 8% cobalt, not only extends the life of the teeth but also improves the quality of each hole cut. This set includes the innovative Plug Jack™, an all-access slot design that speeds up productivity by making plug removal faster and easier. Whether working with thick materials, where Plug Jack™ allows access lower in the cup, or thin materials, where it provides access closer to the teeth, this feature enhances efficiency. For convenient, tool- changes, the Milwaukee universal Quick-Change Arbor is included, making your work smoother and faster. Model Number: 49-56-0237