Description:U-shaped spiral flutes ensure rapid chip removal and less wear when high-speed drilling, improving work efficiency.With 4 flats on the square shank, the drill bit provides a firm grip on the machine, which ensures stable performance.High-hardness tungsten steel drill bit is sharp and durable for high speed drilling.There are 7 specifications for you to choose from: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm and 25mm. Its length is 200mm.Drill bit is perfect for drilling brick wall, cement wall, concrete wall, stone and other materials.Item Name: Drill BitMaterial: Tungsten SteelColor: Silver Features: Square Shank, Quick Chip Removal, Smooth DrillingSpecifications: Diameter: 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mmSize Details: Length: 200mm/7.87" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Drill Bit