Features: *Made of Steel material, overall heat treatment, hardness HRC 60 ± 2, large torque, good toughness. *The for is bluish, and it is resistant to rust. *Powerful Function: Strong magnetic,can suck the screws easily when used it. *Wide Using Application: Can be used for manual electric screwdriver, screwdriver, drill, air and other tools. *Exquisite workmanship, each edge can be accurately locked screws, no damage to the screw, and the screwdriver head. *Professional multi size package, hexagonal handle on 65mm length. Use different sizes to screw, will damage screwdriver and the screw! Using the correct screwdriver bar, pay the less effort, and can easily unscrew the screws! Specification: Product Name: Square Head Screwdriver Bit Material: Steel Color: Dark Blue Optional Type: SQ0, SQ1, SQ2, SQ3 Length: (Approx. ) 65mm Shank Size: 6.35mm (1/4Inch) Suitable for: manual electric screwdriver, screwdriver, drill, air and other tools. Quantity: 1pc Package Included: 1 × Screwdriver Bit Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.Made of high quality material, and practical to use. High quality assurance: Each product undergoes strict quality testing to ensure that you can provide the best quality experience. User-friendly design: The product features and appearance are carefully designed, easy to operate, and suitable for various usage scenarios. Multifunctional practicality: It has a variety of practical functions to meet your diverse needs and improve the quality of life. Environmentally friendly materials: Made of environmentally friendly and safe materials, harmless to the human body, while paying attention to environmental protection. Excellent cost performance: Provide excellent quality at a reasonable price to ensure a shopping experience that is worth the money.