Light: The screwdriver is light, and is commonly used in a variety of screwdriver storage and pen body, which is comfortable to hold and not slip Self-contained ruler: Scales are print on the side of the body to accurately measure objects Nonslip handle, easy to operate: better grip on finger, and not slipping at work Quick disassembly and assembly of suction batch head: suction batch head, only close to the position of batch head, the batch head can be adsorbed and installed, saving time and effort Storage bin: 22 / 10 types of batch head are all stored by attraction and stored in the pen body, which is clean, and not easy to lose, Manufacturer: Tsophreniq