QUALITY MATERIAL - Tungsten carbide tipped cutter and anti-rust electroplated steel drill bit body, built for faster penetrating, prolonged life and heavy-duty use. PROFESSIONAL DESIGN - Spear-shaped cutter design will effectively reduce breakout. HEX SHANK - Hex shank allows for stable holing and quick release in power drill. 1/4" hex shank design for quick release. 5PC BITS - The set includes 5pc of 1/2" dia. tile and glass drill bits, well packed in a plastic case for easy storage and transportation. MULTIPLE PURPOSE - These masonry drill bits can easily penetrate tile, terracotta, concrete, cement, ceramic brick, glass, plastic, cinderblock, wood and many more. Please try to keep the drill vertical and use water or coolant for lubrication when drilling. Hymnorq 1/2 Inch Glass and Tile Drill Bit 5pc Set