HIGH QUALITY MATERIALS It is made of high quality YG6X alloy as raw material. The cutting head oxynitriding process makes the drill bit hard. ELECTROPHORETIC SURFACE PAINTING PROCESS Complete and anti-rust treatment, clean and sharp without burrs. The drill bit is more wear resistant and more durable. Fully automated polishing: the polished CNC is fully automated, each is unified. UNIQUE CROSS-ANGLE DESIGN Small resistance to incision Stable drilling, fast speed, without breaking the border. Neat opening, smooth, no broken edges, no shaking phenomenon, flakes easily. WIDE USAGE Professional glass and tile drill bits provide smooth and precise drilling in ceramic tile, marble, thin iron plates, mirrors and glass. Don't forget to add water or liquid cooling during drilling. Color: 5mm (4pcs) FEATURES MATERIALS Cemented Carbide SIZE 5MM CONTENT OF THE PACKAGE Universal drilling tool 4 pieces NOTE Due to manual measurements, please allow slight measurement deviations. Due to the different display and lighting effects, the actual color of the item may be showing slightly different from the color shown in the