Diablo Hammer Drill Bit Set DMARG1030 P5 3 16 Inch (5 Pack 6 Inch Length Carbide Tipped Impact Strong Hex Shank For Concrete Masonry Stone Drilling) 8" this blade is designed to this blade is designed to tackle the most rigorous commercial tile applications Multi Material Contour Cutting: Transitioning between fine wood veneers and thin structural aluminum profiles by dynamically tuning the variable speed motor dial Impact Resistant Carbide Tips: Specialized brazing and hardening technology withstands extreme thermal shock and high impact percussion forces Cordless Power Maximization: Low friction structural engineering reduces tool motor drag to deliver more drilled holes per runtime battery charge