MULTIGRIND HEAD: Designed with multiple cutting edges for harder tile materials FAST DRILLING IN HARD MATERIALS: Delivers 20 percent faster drilling than glass and tile bit SPECIALIZED CARBIDE TIP: Centers for no-skate drilling and greater ease of use HIGH-QUALITY CARBIDE MATERIAL: Provides longer life in hard materials THREE FLAT SHANK ON 3/8 IN. BITS AND ABOVE: Offers outstanding bit grip to avoid slippage ENGINEERED FOR USE IN NATURAL STONE TILE, SLATE, GRANITE AND OTHER SPECIALTY TILE MATERIALS (SPECIALTY TILES THAT MAY BE HARDER THAN NORMAL TILE) NOT RECOMMENDED FOR USE ON PORCELAIN TILES ALSO COMPATIBLE WITH HAMMER DRILLS