General description The CSPARKV 5 Pcs Magnetic Bit Holders set includes five extension bit holders of varying lengths (50mm, 60mm, 100mm, 150mm, and 300mm) designed to enhance your drilling and screwing tasks. Made from high-quality steel and aluminum alloy, these holders are built for maximum durability and are resistant to rust, corrosion, and oxidation. The built-in permanent magnet ensures that bits stay securely in place, improving work efficiency, especially in tight corners and confined spaces. Technical specifications Material: High-quality steel and aluminum alloy Sizes: 50mm, 60mm, 100mm, 150mm, 300mm Shank size: 6.35mm (1/4-inch hex) Compatibility and accessories Compatible with power drills, screwdrivers, impact drivers, and various other tools Usage Ideal for removing or tightening screws in hard-to-reach areas Enhances the functionality of your existing tools