Tungsten Carbide Hole Saw With Permanently Bonded Tungsten Carbide Grit Have Gulleted Carbide Grit Serrated Edge Blade Gives A Smooth Fine Finish Used Dry. carbide Grit Is Perfect Can Light Saw / Hole Saw For Can Lights For Cutting Holes In Drywall Ceiling For Recessed Lighting 4 Inch To 6 Inch Can Hole Cutter, Tungsten Grit Hole Cutters Can Bore In Both Directions So Can Be Reversed, Can Be Wire Brushed Clean To Increase Life Span When Drilling Holes In Soft Materials. Can Be Used In Corded Or Cordless Drills. Great For Boat Building Plumbing Pipes Through Walls, Running Electrical Cables Through Brick Walls Recessed Light Saw Installing Atmos Speaker In Ceilings And Wall Speakers.running Sink Waste Pipes Through Masonry Walls. Add A Hole Saw Extension From Our List For Drilling Deep Holes. Cutting Materials List : Drywall Plaster With Lath Hardy Board Cast Iron Concrete Marble Slate Travertine Glossy Wall Tiles Hardie Board Plaster And Cement Siding Cement Board Backer Board Styrofoam Pvc Acrylic Composite Boards Epoxy Resin Carbon Fiber Electrical Outlet Cutouts Grp Glass Reinforced Plastic Cfrp Carbon Fiber Reinforced Plastic, Hardwood Flooring, Laminate Flooring, Plasterboard. Remember Carbide Drill Bits And Carbide Hole Saw Set Whilst A Great Masonry Hole Saw They Are Not Designed For Dense Stone And Granite, Thats What Our Diamond Grit Edge Hole Saws And Core Bits Are For.