General description Used most often in the automotive and aerospace industries, this 20-piece screwdriver bit set emphasizes the optimum weight-to-strength ratio, ensuring reliability and accessibility in production environments. The set is designed for the insertion and removal of fasteners and fixings using 1/2 inch square drive tooling. The unique knurled body of the bit provides extra grip, essential for quick tool changes, especially when hands are greasy or oily. Constructed from chrome vanadium steel with a chrome-plated mirror finish, this set is built for durability. Each bit features a ball retaining groove on the square drive for a secure lock with fasteners. The set is supplied in a robust plastic case for easy storage and transportation. Technical specifications Bit Type: Phillips Hex Drive Size: 1/2 inch Drive Type: Square Finish/Coating: Chrome-plated Hex Bit Sizes: 1/4", 8mm, 12mm, 3/16", 7mm, 5/16", 17mm, 9/16", 5mm, 3/4", 3/8", 10mm, 6mm, 14mm, 4mm, 1/2", 19mm