Features: *Made of alloy steel, high hardness. *Suit for pneumatic screwdriver or electric screwdriver. *Hex shank prevents stripping during high-speed drill . *Delicate and precise production are suitable for household screws and major appliances. *The head is magnetic, which can firmly absorb the screws to prevent slipping and improve work efficiency. *Double-head design, both ends are PH2, the length is optional: 65/100/150/200/250/300mm. Specification: Product Name: Screwdriver Bits Material: Chrome vanadium alloy steel Color: copper-colored Shank: 1/4'' (6.3mm) Hex Type: Double head Head: PH2 Magnetic: yes Optional Length: 65mm, 100mm, 150mm, 200mm,250mm, 300mm Suitable for: pneumatic screwdriver or electric screwdriver. Package Included: 1 × Screwdriver Bits or 10pcs Screwdriver Bits 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.