Features: FAST AND EFFICIENT DRILLING: The four-blade cross design enables rapid drilling, reducing the time and effort required to complete your projects. The eccentric shape allows for better control and stability during drilling, reducing the risk of slipping and ensuring accurate hole placement. CLEAN AND SMOOTH HOLES: Our drill bit's unique design minimizes splintering and produces clean, smooth holes in various materials. Enjoy professional-grade results and a polished finish every time. VERSATILE USE: These drill bits are suitable for various materials, including wood, plastic, concrete, brick, marble, glass, ceramic, and metal. It offers the versatility you need for a wide range of projects. ENHANCED DURABILITY: The premium material provides increased hardness and resistance to wear, withstanding heavy-duty use and maintaining sharpness and performance over time. The spiral groove design clears particles quickly and reduces friction and heat for faster, cooler drilling performance. COMPATIBLE TOOLS: The set includes 7 commonly used drilling sizes (3/4/5/6/8/10/12mm) to meet your needs. Notice: 1. Actual color may be slightly different from the image due to different lighting conditions. 2. Please allow 1-3cm deviation due to manual measurement. Specification: 7pcs (3/4/5/6/8/10/12mm) Package List: 7pcs Concrete Drill Bit Set