3Pcs T 4-Blade Router Bits: Cutting Thickness 6.35mm, 8mm,10mm, Shank: 8mm. Alloy Material: Tungsten carbide material, baked with a heat-resistant coating, it can prevent the accumulation of sawdust, resin and asphalt. Ball Bearing Guide: Top bearing design which makes the work more efficient. Suitable for solid wood, MDF, particle board, plywood, etc. Multiple Uses: With these tongues, you can create beautifully handmade furniture. It is ideal for kitchen and bathroom doors, office cabinets, floor tables, bedroom shelves, exterior frames, walls and more.