Description:High-quality materials use high-quality YG6X alloy as raw materials. The bit oxynitriding process strengthens the hardness of the bit.Surface electrophoresis painting processFully polished and anti-rust treatment, clean and neat without burrs. The drill bit is more wear-resistant and more durable. Fully automatic polishing: polishing CNC is fully automatic, each one is uniform.Unique cross angle designThe cutting resistance is small, the drilling is stable, the speed is fast, and the edge is not broken. The opening is neat, smooth, without broken edges, without tremor, and not easily broken.widely usedProfessional glass and tile drill bits can drill smoothly and accurately on tiles, marbles, thin iron plates, mirrors and glass. Remember to add water or coolant when drilling.Different sizes suitable for your different needs. It can be installed on general hand drills and bench drills. The range of machine drill fixture is 10mm and above.Specification:Material: cemented carbideColor: (As Pictures Show)Quantity: 6pcsProduct Size:4mm, 5mm, 6mm, 8mm,10mm12mmPackage Contents:6 * drilling bitNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.