Feature:1. Excellent Steel: The hex driver bits are crafted from Cr molybdenum steel, ensuring high strength and durability. The black coating further enhances erosion resisting, guaranteeing reliable performance2. Fine Processing: Featuring fine machining drill tips, these hex head wrench bits provide a secure hold on fasteners. The hex head design ensures even torsion distribution for stable use during replacements3. Size Markings: Each impact wrench bit socket is equipped with etched size markings, allowing for convenient recognition and easy selection of the correct drill bit, saving time and labor during projects4. Extended Length: Boasting an extended length, these wrench bits effortlessly access and manipulate components in confined spaces, they enhance versatility and efficiency in various applications5. For Impact Wrench: Designed to seamlessly integrate with impact wrench equipped with friction rings or retaining pins, these bits offer a secure connection and optimal performance, ensuring powerful torsionSpecification:Item Type: Hex Head Drill BitMaterial: Cr Molybdenum Steel.Package List:10 x Hex Head Wrench Bit1 x Storage Box