The 2" x .145 Premium Turbo ZZ Diamond Wet Core Bit has 7.5mm segments and is great for cutting a variety of materials including concrete, reinforced concrete, masonry and stone. The segment cutting surfaces slant alternately to penetrate fast and prevent the bit from wandering when drilling is started. The segments retain much of their beveled edge even after significant wear. Bits are Laser-welded to hold up under extreme heat and cutting pressure.