Feature: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 BitMaterial: S2 steel surface plating anti rustHead Type: Ball EndSystem: MetricShank Dia: Approx. 1/4in / 6.35mmHardness: About 56-58 HRCApplicable Screw: H3.0/4.0/5.0/6.0(mm)Characteristic: High precision, durable, magnetic, multipurpose, magnetic bits, can easily hold the screws during installationFitment: Universal fit for electric screwdriver, manual screwdriver, electric drill, air screwdriver and other tools..Package List:4 xBall End Hex Screwdriver BitNote:The product is multidirectional, the ball head design rod connection is narrow processing, the maximum torsion is slightly lower than the straight rod, if used for power tools, please note torsion overload.