37 in 1 screwdriver combination set, using a color coding systems to distinguish different bit by color, allowing users to quickly find the required tool The rear hat belt bearing use low center of cylindrical device, which can effectively reduce hand fatigue during use and generate flywheels effect Compared with ordinary screwdriver, it is easy to apply force and suitable for technicians and enthusiasts who operate for long time The storage box make the entire set of tool weigh only 350g, making it easy to carry around Solved the problem of cumbersome tool when going out, it is very suitable for users who need small repairs during travel This set have multiple specifications of bit, suitable for various devices such as mobile phones, tablets, and computers, and solves various maintenance needs Both home users and professional repair shops can easily handle various tasks The specially grooves ensures that the bits is stable and doesnot fall off during use, effectively avoiding the impacts of accidental dropping on maintenance efficiency After experimental verification, the durability have been doubled, making it suitable for disassembling and assembling precisions equipment such as mobile phones, glasses, and laptops, Manufacturer: ERRORY