Description:High hardness and wear resistance make it can be used for a long time. The unique cross angle design makes the incision resistance small.The sharp characteristic makes it have a very efficient work efficiency. Fully polished treatment makes it very rust-proof and smooth.Made of hard alloy material, it is very durable to use.There are eight specifications for you to choose from: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm.It is a professional glass and tile drill bit that can provide accurate drilling on tiles, marble, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling.Item Name: Triangle Drill BitMaterial: Hard AlloyColor: Golden ColorFeatures: Sharp, Wear-resistant, Punch ToolsSize Details: 3mm: Total Length: 7cm/2.76", Drill Bit Head: 0.3cm/0.12" (Approx.)4mm: Total Length: 7cm/2.76", Drill Bit Head: 0.4cm/0.16" (Approx.)5mm: Total Length: 7.6cm/2.99", Drill Bit Head: 0.5cm/0.2" (Approx.)6mm: Total Length: 7.7cm/3.03", Drill Bit Head: 0.6cm/0.24" (Approx.)7mm: Total Length: 8cm/3.15", Drill Bit Head: 0.7cm/0.28" (Approx.)8mm: Total Length: 8cm/3.15", Drill Bit Head: 0.8cm/0.31" (Approx.)10mm: Total Length: 8.3cm/3.27", Drill Bit Head: 1cm/0.39" (Approx.)12mm: Total Length: 8.3cm/3.27", Drill Bit Head: 1.2cm/0.47" (Approx.)Shank Diameter: 0.625cm/0.25" (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 Triangle Drill Bit