The Craftsman Hex Allen Bit in 5/16” size with a 1/4” drive is a high-quality hand tool designed for automotive use. Made by Craftsman, a trusted brand, this single item features a standard socket type and SAE system of measurement. The chrome surface finish ensures durability and resistance to corrosion, making it a reliable tool for various automotive maintenance and repair tasks. Ideal for professionals and DIY enthusiasts alike, this hex allen bit is a valuable addition to any toolbox.