About this item [ High Performance Materials ] The 159mm hole saw is made of M42 Bi-metal and HSS (High-Speed Steel), with Heavy Duty Arbor, the hardness up to 65HRC. Higher toughness, stronger wear resistance and higher performance cutting strength! [ Fast Efficient Smooth ] High-quality bi-metal band and the best cutting performance of HSS teeth combines with Non-binding clean edge design ensures smooth and clean cutting of the hole saw blade. [ Saw Size ] Cutting Diameter: 6-1/4 inch / 159 mm; Cutting Depth: 1.3 inch / 32 mm; Arbor Shank Diameter: 0.5 inch / 12.7 mm; This Hole Saw Drill Bit is designed for wood and plastic cutting. [ Wide Application ] The 6-1/4 hole saw is very suitable for corn hole drilling, bean bag board, duct, wood, drywall, plastic, acrylic, gypsum board, thin metal and other home projects, such as recessed lights, speakers, air ducts, etc. [ Rierdge Promise ] Package contains 1 pcs Hole Saw, 1pcs Heavy Duty Arbor and 3 pcs Drill Bit, meet your needs in quantity. If you are not satisfied with your purchase at any point and for any reason, please don't hesitate to contact us. We will respond quickly within 24 hours! If within 30 day you are not satisfied return your product for refund! That's the Rierdge Promise.