Features： 1、High Quality Material: Ball end hex screwdriver bit set is made of high quality S2 steel material, high hardness, rustproof, strong and durable. 2、Professional Design: Hex screwdriver bit set features magnetic head, professional manufacturing, fine workmanship, high precision. 3、Strong Magnetic: The magnetic head can easily hold the screws during installation, can improve your work efficiency, save your energy. 4、Special Ball End: Ball head hex shank bits can tilt 25 degree angle operation suitable for small space operation, convenient for using. 5、Widely Use: Hex head wrench drill bit set can be used for electric screwdriver, manual screwdriver, electric drill, and other tools. Specification： Item Type: Ball End Hex Screwdriver Bit Material: S2 steel surface plating anti rust Head Type: Ball End System: Metric Shank Dia: Approx. 1/4in / 6.35mm Hardness: About 56-58 HRC Applicable Screw: H3.0/4.0/5.0/6.0(mm) Characteristic: High precision, durable, magnetic, multipurpose, magnetic bits, can easily hold the screws during installation Fitment: Universal fit for electric screwdriver, manual screwdriver, electric drill, air screwdriver and other tools. Package List： 4 x Ball End Hex Screwdriver Bit