[Unique Cross 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 compatible with home, telecommunications, car or mechanical maintenance work.[7 Different Sizes]Suitable compatible with your different needs. It Can be installed in the general electric 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.SpecificationsMaterials: Cemented Carbidecolor: as shownDiameter: 3/4/5/6/8/10/12 mmPackage Contents: 7pcs Drill Bit (3/4/5/6/8/10/12 mm)Only the above package content, other products are not included.Note: Light shooting 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.