Description:Triangular shank design makes the operation more stable and reliable. Exquisite and high-quality workmanship makes it very strong and durable.The wide range of applications makes it very practical and useful to use. Simple and convenient use steps will not waste your time.Made of hard alloy material, it is very durable to use.The length of the storage box is 15.8cm, the width is 6.7cm and the height is 1.4cm.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: BlueShank Type: Triangular ShankFeatures: High Hardness, Sharp, Wear-resistant1: 5mm, 6mm, 8mm, 10mm, 12mm2: 6mm, 6mm, 8mm, 10mm, 12mm3: 5mm, 6mm 6mm, 8mm, 10mm, 12mm4: 5mm, 5mm, 6mm, 6mm, 8mm, 10mm, 12mm5: 6mm, 6mm, 6mm, 6mm, 8mm, 10mm, 12mm6: 6mm, 6mm, 8mm, 8mm, 10mm, 12mmSize Details: Box Size: 15.8cm x 6.7cm x 1.4cm/6.22" x 2.64" x 0.55" (Approx.)5mm: Total Length: 8.2cm/3.23", Drill Bit: 0.5cm/0.2", Work Length: 4.3cm/1.69", Shank Diameter: 0.45cm/0.18" (Approx.)6mm: Total Length: 10cm/3.94", Drill Bit: 0.6cm/0.24", Work Length: 5.6m/2.2", Shank Diameter: 0.7cm/0.28" (Approx.)8mm: Total Length: 11.6cm/4.57", Drill Bit: 0.8cm/0.31", Work Length: 7cm/2.76", Shank Diameter: 0.7cm/0.28" (Approx.)10mm: Total Length: 12cm/4.72", Drill Bit: 1cm/0.39", Work Length: 7.3cm/2.89", Shank Diameter: 0.8cm/0.31" (Approx.)12mm: Total Length: 12cm/4.72", Drill Bit: 1.2cm/0.47", Work Length: 7.3cm/2.89", Shank Diameter: 1cm/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:1: 5 x Triangle Drill Bits (5mm, 6mm, 8mm, 10mm, 12mm)or2: 5 x Triangle Drill Bits (6mm, 6mm, 8mm, 10mm, 12mm)or3: 6 x Triangle Drill Bits (5mm, 6mm 6mm, 8mm, 10mm, 12mm)or4: 7 x Triangle Drill Bits (5mm, 5mm, 6mm, 6mm, 8mm, 10mm, 12mm)or5: 7 x Triangle Drill Bits (6mm, 6mm, 6mm, 6mm, 8mm, 10mm, 12mm)or6: 6 x Triangle Drill Bits (6mm, 6mm, 8mm, 8mm, 10mm, 12mm)