Feature: 1. Unique crown drill head for easy center positioning when drilling. 2. Perfect chip-removal ability with overall sandblasting treatment. Special triangle shank for preventing slipping. 3. steel drill bits with carbide crown drill head for longer bit life and cleaning debris out for fast \u0026 efficient drilling. Specification: Need to drill masonry, cement, concrete or wall? Try our MK23 7PCS Masonry Drill Bit Set! The drill bits are very High quality for all your rugged drilling needs, easy to use and drill holes quickly and efficiently. Features: Unique crown drill head for easy center positioning when drilling. Perfect chip-removal ability with overall sandblasting treatment. Special triangle shank for preventing slipping. steel drill bits with carbide crown drill head for longer bit life and cleaning debris out for fast & efficient drilling. Premium quality and high precision, High quality to make holes for mechanical anchors. Suitable for drilling holes in masonry, cement, ceramic tile, brick, block, rock, stone, concrete, metal, plastic, wood, etc. Specifications: Brand Name: Meterk Color: Silver Material of Cutting Head: Steel (YG8) Material of Shank: Chrome Vanadium Steel (CR-V) Surface Treatment: Overall Sandblasting Hardness: HRC97.5 Shank: Triangle Handle Size: Diameter * Length 3/16"*80mm, 1/4"*100mm, 5/16"*100mm, 1/4"*152mm, 5/16"*152mm, 3/8"*152mm, 1/2"*152mm Drilling Objects: Masonry, Cement, Ceramic Tile, Brick, Block, Rock, Stone, Concrete, Metal, Plastic, Wood, etc Suitable Usage: Home Decoration, Walls Perforation, Wire Switch Installation, Photo Frame, Closet Installation, Installation of Lamps, etc Package Size: 18 * 4 * 2cm / 7.09 * 1.57 * 0.79in Package Weight: 242g / 8.54oz Package List: 7 * Masonry Drill Bit Package List: 7 * Masonry Drill Bit