About Us: Specializing in Home and Office products, Jiozermi works on provides reliable, high-quality and practical products for global customers. Your satisfaction is our top priority. We hope you can try our products Jiozermi 1-3/4 Inch Hole Saw, 45 mm HSS Bi-Metal Hole Saw, 1.45 Inch Cutting Depth Saw Drilling Tool for Wood Cornhole Board Plywood Plastic Drywall Metal Fiberboard, Matte Black Specification: Material: M42 high-speed steel and BI metal Color: Matte Black Cutting Diameter: 1-3/4 inch / 45 mm Cutting Depth: 1.45 inch / 37 mm Cutting Step: 1.Installing guide holes and hole saws. 2.Fix the drill bit straight on the cutting surface and then rotate clockwise to drill. 3.When drilling, the drill bit should be kept stable, not shaken, cut slowly and maintain a stable pressure. 4. The hole saw then cuts out the hole immediately. Package includes: 1 x 1-3/4" Hole Saw 1 x Hex Shank Arbor 3 x Center Bits 1 x Allen Wrench 30 Days Warranty & No Risk Purchase Jiozermi love giving our customers satisfactory products at an affordable price and have a pleasant shopping experience If you have any questions about the product, you can contact us by email, we will solve your problem within 24 hours usually. Please give us a chance to solve any problems, thank you! If you are not satisfied with your purchase within 30 days for any reason, let us know and our products support unconditional returns. That's the Jiozermi