Features 1、HARD ALLOY STEEL: Screw driver drill bit is made of excellent S2 alloy steel with a special heat treatment process for added torsion and unmatched hardness 2、CORROSION RESISTANT SURFACE: The impact driver bit surface is treated with black phosphate to effectively prevent corrosion and rust 3、ACCURATE AND PRACTICAL: Hex shank magnetic screwdriver bit adopt CNC accurate machining technology to ensure the accuracy of products 4、IMPACT RESISTANT: Screwdriver drill bits can withstand the instantaneous impact of high torsion pneumatic tools, greatly improving the service life 5、RELIABLE MAGNETIC: The enhanced magnetic impact hex bit kit help you hold screws easily and quickly. The magnetic force will not decay after repeated use, which can improve your work efficiency Specification Item Type: Magnetic Screwdriver Bit Set Material: S2 alloy steel Use: Suitable for electric screwdriver, manual screwdriver, electric drill and air drill. Widely used in home repairs, automotive, and other screw driving applications Package List 7 x Screwdriver Drill Bit