[High Quality]Made of high quality alloy as raw material. The nitriding process of the bit strengthens the hardness of the bit.[Surface electric painting process] After comprehensive grinding and anti-rust treatment, it is clean, sharp and free of burrs. The drill bit is more wear-resistant and more durable.[Unique cross angle design]Small anti-cutting, stable drilling, fast speed and constant boundary. It opens neatly, smoothly, and breaks easily.[Wide use] Professional glass and tile drill bits provide smooth and accurate drilling of tiles, marbles, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling.[5 different sizes] to meet your different needs. It can be installed on ordinary electric hand-held drills and bench drills. The range of the machine drilling clamp is more than 10 mm.colour: as shownMaterial: AlloyPackage Contents:5 x tile drill bits(5/6/8/10/12mm)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.