Description:Designed with triangular shank, it has excellent anti-slip performance for stable and safe drilling operation.In order to improve work efficiency, the drill bit is designed with U-shaped groove with smooth and flat surface for quick chip removal.Using high-quality hard alloy material, the triangular drill bit features excellent wear resistance and maximum durability.There are 5 specifications of triangular drill bits (5mm, 6mm, 8mm, 10mm, 12mm) for you to choose from.They are widely used for drilling ceramic, tile, marble, concrete, glass, metal sheet and other materials.Item Name: Triangular Drill BitsMaterial: Hard AlloyColor: OrangeShank Type: Triangular ShankSpecifications: 5mm, 6mm, 8mm, 10mm, 12mmFeatures: Fast Chip Removal, High Strength, Sharp TipSize Details: 5mm: Total Length: 82mm/3.23", Drill Bit Diameter: 5mm/0.2", Working Length: 43mm/1.69", Shank Diameter: 4.5mm/0.18" (Approx.)6mm: Total Length: 100mm/3.94", Drill Bit Diameter: 6mm/0.24", Working Length: 56mm/2.2", Shank Diameter: 7mm/0.28" (Approx.)8mm: Total Length: 116mm/4.57", Drill Bit Diameter: 8mm/0.31", Working Length: 70mm/2.76", Shank Diameter: 7mm/0.28" (Approx.)10mm: Total Length: 120mm/4.72", Drill Bit Diameter: 10mm/0.39", Working Length: 73mm/2.87", Shank Diameter: 8mm/0.31" (Approx.)12mm: Total Length: 120mm/4.72", Drill Bit Diameter: 12mm/0.47", Working Length: 73mm/2.87", Shank Diameter: 10mm/0.39" (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:5mm:10 x 5mm Triangular Drill Bitsor 6mm:10 x 6mm Triangular Drill Bitsor 8mm: 10 x 8mm Triangular Drill Bitsor 10mm: 5 x 10mm Triangular Drill Bitsor12mm: 5 x 12mm Triangular Drill Bits