7PCS Multi-Purpose Drill Bit Set Heavy-Duty Tungsten Steel Triangle Tip for Tile Glass Marble Wood Metal Drilling

Material: Premium high-speed steel with titanium coating. Size: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm. Package Included: 7PC Four-Edged Serrated Eccentric Drill. 1. Strong Toughness And Wear Resistance. 2. Small Cutting Resistance, Improve Opening Speed, Long Service Life. 3. Industrial Grade Coated Carbide Points And 4 Cutting Edges. 4. Can It Be Installed On Hand Drill, Electric Drill. 5. Suitable For Drilling Ceramics, Granite, Ceramic Tiles, Stone, Wood, Plastic, Concrete Walls