Description:Wear resistance and durability allow it to be used for a long time. Many different specifications allow you to choose the most suitable one.The wide range of applications makes it very reliable and practical. Professional and exquisite workmanship makes it have good impact toughness.Made of hard alloy material, it is very durable to use.There are seven specifications for you to choose from: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm.It is suitable for ceramic tiles, concrete, stainless steel, aluminum, wood, plastic, red brick, etc.Item Name: Triangle Drill BitMaterial: Hard AlloyColor: BlackFeatures: Not Easy to Break, Anti-rust, Fast SpeedSize Details: 3mm: Total Length: 8.3cm/3.27", Drill Bit Head: 0.3cm/0.12", Shank Diameter: 2.8cm/1.1" (Approx.)4mm: Total Length: 8.3cm/3.27", Drill Bit Head: 0.4cm/0.16", Shank Diameter: 3.5cm/1.38" (Approx.)5mm: Total Length: 9.8cm/3.86", Drill Bit Head: 0.5cm/0.2", Shank Diameter: 3.8cm/1.5" (Approx.)6mm: Total Length: 10cm/3.94", Drill Bit Head: 0.6cm/0.24", Shank Diameter: 5cm/1.97" (Approx.)8mm: Total Length: 11cm/4.33", Drill Bit Head: 0.8cm/0.31", Shank Diameter: 7cm/2.76" (Approx.)10mm: Total Length: 12cm/4.72", Drill Bit Head: 1cm/0.39", Shank Diameter: 8cm/3.15" (Approx.)12mm: Total Length: 12cm/4.72", Drill Bit Head: 1.2cm/0.47", Shank Diameter: 9cm/3.54" (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:10 x 3mm Triangle Drill Bitsor10 x 4mm Triangle Drill Bitsor10 x 5mm Triangle Drill Bitsor10 x 6mm Triangle Drill Bitsor10 x 8mm Triangle Drill Bitsor5 x 10mm Triangle Drill Bitsor5 x 12mm Triangle Drill Bits