Description: Many different specifications allow you to choose the right one according to your needs. The solid and durable feature allows it to be used for a long time. The characteristics of stably drilling hole make it very reliable and useful. Electrophoretic paint process makes it very wear-resistant and anti-rust. Made of hard alloy material, it is very durable to use. The length of the storage box is 10.2cm, the width is 9.5cm and the height is 1cm. 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 Bit Material: Hard Alloy Color: Golden Color Features: Stable, Durable, Cross Angle Design Size Details: Box Size: 10.2cm x 9.5cm x 1cm/4.02" x 3.74" x 0.39" (Approx.) 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.) 8mm: Total Length: 8cm/3.15", Drill Bit Head: 0.8cm/0.31" (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: 10 x Triangle Drill Bits