1. Product material: aluminum alloy + chromium vanadium alloy steel. 2. Pen design: its easy to carry around like a pen and use it anytime and anywhere. 3. storage bin: open the storage bin at the to store 8 common batch heads. 4. Built in 8 specification batch heads: cross [ph00 / pH0 / Ph1 / pH2, one word (1.5 / 2.0 / 3.0 / 3.5). 5. Built in strong magnetic field: the head of telescopic rod is equipped with strong magnetic field, which is easy to insert and pull, and the magnetic conduction is transmitted to the bit head. The head of the head can easily pull up small screws. 6. Product features: this pen type screwdriver is easy to carry, with built-in strong magnetic field, and can place 8 bits to the storage bin. It is a practical portable screwdriver. It is suitable for mobile phone, tablet, notebook, watch, glasses, camera and other digital products.