The Arix 1-3/8 inch Diamond Core Drill Bit is a professional-grade tool designed specifically for drilling through tough materials like quartz, porcelain, and marble. Its distinctive green body houses a precisely engineered diamond-segmented cutting edge that delivers clean, accurate holes while maintaining durability. The specialized segment design optimizes cutting performance and heat dissipation during use, helping to extend the bit's working life. This drill bit features a robust construction that stands up to demanding applications, making it ideal for contractors, installers, and serious DIY enthusiasts working with stone and tile materials. The 1-3/8 inch diameter is perfect for common plumbing and electrical installations, while the diamond-embedded segments ensure smooth, efficient cutting through even the hardest surfaces. For best results, use with appropriate cooling and at recommended speeds for the material being drilled.