Feature: 1. Professional Manufacturing: Hex screwdriver bit set features magnetic head, professional manufacturing, fine workmanship, high precision. 2. Function: Each edge can be accurately locked screws, no damage to the screw and the screwdriver head, convenient for using. 3. High Quality Material: Ball end hex screwdriver bit set is made of high quality S2 steel material, high hardness, sturdy and durable. 4. Strong Magnetic: The magnetic head can easily hold the screws during installation, can improve your work efficiency. 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: Hex Screwdriver Bit Material: S2 steel surface plating anti rustHead Type: Ball EndSystem: MetricShank Dia: Approx. 1/4in / 6.35mm Hardness: About 56-58 HRC Applicable Screw: H1.5/2.0/2.5/3.0/4.0/5.0/6.0/8.0/10(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: 9 x Hex Screwdriver Bit1 x Cutting Ferrule