3, 3-5/8 inch 76,92mm Dia Carbide Tipped Hole Saw kit, 2.36" Deep Cutting for Multiple Material, Hardy Plank, Hard Wood, MDF, Wall Tile, Air Brick, 10X More cuts, 5X More Faster Drill through thick material easily. [Advantage] The carbide is made by a famous European company, Automatic welding machine ,Grinding edge machines are from German. [Advantage ] Cuts more than standard bi-metal hole saw for Hardy Plank, Hardwood, MDF, Up to 30 times. HWOWSUPM 6 Carbide Hole Saw Cutter 2.36 Depth Multiple Hole Saw Bit Hardy Plank Mdf Nail Embedded Wood Air Brick Metal 30x Cuts 152mmole Saw Wcts152 499a0fb0 01ea 4553 Bde5 Fe0a9cea6c46.e5629dbcb941ad9ecc123d1787b46687 Massive carbide tips designed to cut wood with nails, cement board, composite enclosures, ceiling tile, and more. Faster than self-feed bits in wood and... Teeth are more shape ,stability , durability and a longer life. For Cutting Hard wood, Hardy Plank, MDF, Fiberglass, Nail embedded WOOD, Non-ferrous Metal, Air Brick. 3 5 8 92mm Inch Carbide Hole Saw Cutter Multi Attention : Lower the SPEED at the beginning, otherwise, it is easy to break teeth.