- This Set Includes: > 3/16" ( 4.7mm) X 3 inch Length > 1/4" ( 6.3mm) X 4 inch Length > 5/16" ( 7.9mm) X 4 inch Length > 1/4" ( 6.3mm) X 6 inch Length > 5/16" ( 7.9mm) X 6 inch Length > 3/8" ( 9.5mm) X 6 inch Length > 1/2" (12.7 mm) X 6 inch Length - CUTTEX TOOLS Masonry Drill Bit Set Made of High quality Carbon Steel after Heat Treatment. Strong and Durable. Excellent Rust Resistance. - Upgraded Design Of Two Flute, Ensure Fast and Efficiently Remove Drilling Dust and Debris. Rock Carbide Tip Maximizes Carbide Surface Contact for Longer Bit Life.The Spiral Shank Increase Cutting Speed and Prevents Slipping. - Suitable for Brick, Block, Masonry, Concrete, Rock, Ceramic Tile, Cement and Artificial Stone, Wood, Plastic and much more. - Excellent Set for Commercial, Professional and Home Use. - Anti-Rust Oil on the Surface to Protect the Hole Saw From Natural Oxidation - CUTTEX TOOLS Masonry Drill Bits Set Comes With a Nice and Thick Nylon Pouch To Keep All Bits Organized and Convenient to Reuse. - If you have any question about our products, please feel free to contact us. We will always provide you with professional services until you are satisfied * DESIGN & QUALITY INSPECTED BY CUTTEX TOOLS - ORANGE COUNTY - CALIFORNIA