Description: 【Impact Resistant Design】: Specifically crafted for high impact and high strength applications, this screwdriver bit is ideal for use with impact screwdrivers, ensuring durability and reliability in demanding tasks 【Superior Hardness】: Made from optimized alloy steel materials, the bit boasts an impressive hardness of 62HRC, making it exceptionally sturdy and long term for various repair needs 【Mechanical Principle Engineering】: Designed with advanced mechanical principles, the bit effectively absorbs collision forces upon contact with screw heads, reducing the risk of breakage by distributing efficiently 【Versatile Application Range】: Perfectly suited for a wide array of repair tasks including mechanical repairs, furniture assembly, automotive maintenance, camera repairs, toy fixing, and bike maintenance 【Enhanced Features】: Equipped with high hardness and capabilities along with strong magnetic properties to prevent slipping; it is also wear resistant and rustproof to ensure longevity in diverse working conditions Specification: Material Alloy steel Size Chart: Handle diameter 6.35mm/0.25inch Length 2.5cm/0.98inch, 5cm/1.97inch, 6.5cm/2.56inch, 7cm/2.76inch, 9cm/3.54inch, 15cm/5.91inch Package Includes: 6 Screwdriver Bits Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.