General description High Quality Raw Material: Screwdriver bits made of chrome vanadium steel, corrosion resistant and durable through high temperature quenching treatment. Practical Design: Magnetic screwdriver bits have a 6.35mm diameter hex shank for quick and easy changing, strong compatibility. Wide Application: Long screwdriver bits are suitable for home DIY, woodworking, auto parts, professional machine maintenance, etc. Technical specifications Material: Chrome vanadium steel Hex shank diameter: 6.35mm Sizes included: 25mm, 50mm, 65mm, 70mm, 90mm, 150mm Compatibility and accessories Compatible with Bosch, Milwaukee, DeWalt, Metabo, Makita, etc. Usage Ideal for home DIY projects Suitable for woodworking Applicable for auto parts and professional machine maintenance