Features and Benefits:•Up to 2x Longer Life•Up to 20% faster drilling in natural stone•Hammer mode capability for faster drilling in granite, marble and stone•For use with glass, tile, ceramic, granite, marble, limestone, slate, and stone•Reinforced tip for maximum durability•Precision ground carbide for clean holes•Not recommended for porcelain tile•For use in hammer drill drivers•Round shank•Available in sizes up to ½“This drill bit set includes (1) 1/8", (1) 3/16", (1) 1/4", and (1) 5/16" glass and tile bits.