General description This 9-piece Concrete Drill Bit set is designed for efficient drilling in a variety of materials including concrete, ceramic tiles, stone, wood, aluminum, plastic, and multi-layer materials. Each bit features an X-shaped head with a cross-spline design for optimal disassembly and ease of use, ensuring better penetration and effective waste removal. Technical specifications Set includes drill sizes: 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm Length of each drill bit: 160mm Drilling depth: 100mm Material: High-quality hard metal steel with tungsten carbide tip Design: Double fluted spiral for efficient waste removal Shank type: SDS-PLUS, compatible with most rotary impact drills Usage Ideal for drilling holes in concrete, granite, stone, ceramic tiles, wood, aluminum, plastic, and multi-layer materials Perfect for creating common bolt and dowel holes Other information For safety, the use of a three-prong impact drill is not recommended Optimized groove design