Suitable for 6 kinds of glass drill bits in different sizes: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, all with 1/4 inch hex shank, perfectly suitable for different tasks, this drill bit is marked with size markings. Carbide steel material is the first choice, it is harder and more wear-resistant than traditional drill bits. The drill shank is cut to form the hexagon of the main body, so that the drill bit is clamped more firmly and the drill bit is not easy to slip. Four blade design, low resistance when cutting, no need for precise input. The surface of the drill body is ground without core, and the removal of drill bits and chips is smoother. Compatible with lithium electric drills, hand drills, bench drills and other models, suitable for glass, ceramic tiles, marble, red brick cement walls. For DIY enthusiasts and interior decorators, drilling glass tiles, ceramic mirrors and other hard and fragile work surfaces is essential.