[Unique Angle Design]Small incision resistance,feature drilling stably, fast speed, not breaking the border. Opening neat, smooth, no broken edges, no tremor phenomenon, chip easily. [Superb Crafts]Full-grinding and anti-rust treatment, the drill bit is more wear-resistant and more durable, fully automated polishing, polished is fully automated, each one is unique. [Easy To Carry]Light weight, small size and compact design. You can take it with you and use it for home, telecommunications, car or mechanical maintenance work. [7 Different Sizes]Suitable for your different needs. It Can be installed in the hand drill, bench drill. The machine drill clamp range is 10mm and above. [Widely Used]Professional glass and tile drill bits provide smooth and accurate drilling in ceramic tiles, marble, thin iron plates, mirrors, and glass. Remember to add water or coolant when drilling. Specifications Materials: Cemented Carbide color: as shown Diameter: 3/4/5/6/8/10/12 mm Package Contents: 7pcs Drill Bit (3/4/5/6/8/10/12 mm) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.