Add Tool Versatility – Our Concrete Drill Bit Set includes 10 pieces of 1/4 inch diameter bits, total length 3.93 inch, ideal for projects that need a lot of 1/4 inch holes 1/4”Hex Shank – Heavy duty masonry drill bit set equipped with the most popular 1/4 inch hex shank, compatible with most of the tools with quick change chuck (please turn off hammer motion) Good for Most Materials – ideal for drilling concrete, tile walls, bricks, ceramic,thin steel and more; while drilling harder materials, please use water or coolant Sharp & Durable – Concrete Drill Bit with sharpened ground carbide tip provides faster drilling speed into masonry materials and last a longer drilling life if use properly Convenience – 10 Pcs Concrete Drill Bits come in a high-quality case for convenient access and safe storage; If you need any assistance in using the product, feel free to contact us for satisfactory customer service 10 Piece 1/4 inch diameter quick change hex shank Masonry Drill Bit SetFeatures:1. These bits are built with carbide tips, which provide faster drilling speed into masonry materials and concrete.2. They can also last longer life when used properly. The key point is to cool the bit enough when you drill hard materials, or when you need to drill many holes. 3. A precision ground tip enables these bits to deliver faster start and reduce tip walking in concrete, brick and block. 4. These masonry drill bits equipped with wide flute design remove dust speed faster, reduce heat more efficientlySpecifications:Shank: 1/4inch Hex ShankTotal Length: 3.93 inchDiameter: 1/4 inchCompatible materials:Concrete, walls, bricks, ceramic, glass, tiles, thin steel and morePackage includes：10 pieces of 1/4 inch concrete drill bits (6mm)