strength and long lasting These magnetic screwdriver bits are designed for strength screwdriving operations. They are suitable for use with screwdrivers, electric screwdrivers, and hand drills. Made of alloy steel, these bits are wearresistant and rustresistant, providing longlasting durability. With a hardness level of HRC62, they can withstand heavyduty use. Compatibility The screwdriver bits are compatible with various types of screws, making them suitable for a wide range of applications. Whether you are working on DIY projects or professional tasks, these bits can handle different screw types efficiently. Multiple size options Choose from different size options to meet your specific needs. The available sizes are: 3PCS: 50+65+90mm 4PCS: 25+50+65+70mm 5PCS: 25+50+65+70+90mm 4PCS: 50+65+70+90mm Select the appropriate size for the task at hand and performance. Cross design These screwdriver bits feature a cross design, allowing for secure and efficient screwdriving. The cross shape provides a strong grip on screws, minimizing the risk of slipping or stripping. Use scenarios DIY furniture assembly or mounting fixtures in home improvement projects, where multiple screw types are encountered. Professional tasks such as installations, repairs, or maintenance that require reliable performance across different screw types. Heavyduty screw driving in woodworking, cabinetry, or construction projects where strength and durability are important.