new 8 Piece Masonry Drill Bits Set 1/2″ 3/8″ 5/16″ 1/4″ 5/16″ 1/4″ 3/16″ 5/32″ Black-Oxide Metal Carbide Tip and Round Shank Metal Drill Bit Set About this item 【Quality Drill Bits with Innovative Design】 Made of chrome-vanadium steel with a crown drill head, which offers higher drilling speed and larger drilling power. The sandblasting treatment offers better rust protection and reduces friction. Capable of drilling through most hard surfaces 【High Efficiency & Durable Masonry Bit】The spiral shank increase cutting speed and prevents slipping. It also removes flakes and debris easily, leaving you a clean and smooth hole. The drill bits are durable and will stay sharper 【Multiple Sizes】The masonry drill bit set includes the bits in the most popular diameter range, 5/32, 3/16, 1/4, 5/16, 3/8, and 1/2 inch, which can help you complete almost any drilling tasks 【Broad Application】Easily drills through Concrete, Cement, Brick, Wood, Plastic and much more. A must-have tool for general home usage and industry projects