- Set of 5 PH3 screwdriver bits with 5/16" hex shank, suitable for manual screwdrivers and electric drills - Made of high-hardness S2 steel, ideal for demanding jobs and professional use - Galvanized finish that protects against corrosion and extends the lifespan of the bits - Magnetic tip allows you to hold screws securely and efficiently - Perfect as replacements for damaged, bent, or lost cross-head bits - Compatible with a wide variety of tools and applications: automobiles, trucks, engines, motorcycles, computers, cable boxes, and mobile phones - Precise design prevents damage to screws and the screwdriver head - Recommended for DIY, repair, and maintenance tasks at home or in the workshop