This 100-piece concrete screw assortment kit includes five commonly used 3/16" sizes for a wide range of fastening jobs. The screws are made of heat-treated hardened carbon steel with a blue rust-resistant coating for dependable indoor and outdoor use. Diamond tips, high-low threads, and serrated edges help improve penetration and grip in concrete, brick, block, and wood. The kit also includes a Phillips bit and drill bit for convenient installation. A transparent storage box keeps the assorted sizes organized and easy to access.