General description Triangle Drill Bit Set includes 10 drill bits in four different sizes, accompanied by two small boxes for easy carrying and organization. These drill bits are designed for high precision in centering drilling, making them suitable for various materials including glass, tile, mirrors, wood, ceramic, marble, and brick walls. Technical specifications Sizes included: 4 x 6 mm, 2 x 8 mm, 2 x 10 mm, 2 x 12 mm Material: Tungsten carbide Design: Triangular drill bits with U-shaped housing Shank type: 3-point flat-shank Installation These drill bits can be installed on most handheld and benchtop electric drills. All bits are stored in a storage box for quick replacement. Usage Ideal for drilling holes in various hard and brittle materials, including glass, tile, mirrors, wood, ceramic, marble, and brick walls. The design allows for efficient dust removal without leaving burrs.