[Screwdriver Flexible]: The flexible drill bit extension can be used for ordinary hand electric drills and electric drills with perfect performance. It can be bent, twisted, turned, and used in narrow and narrow spaces. Easy, Lightweight, fast, connect to the standard hex screwdriver. It's good for the Wrench, can be connected to drill, rechargeable drill or manual wrench. [Size]: The size of the connection part of the hexagonal shank bit is 6.35mm (1/4inch), and the size of the internal hexagonal head connector is 6.35mm (1/4inch). [Easier and Quicker]: Screwdriver Flexible is Universal in any Directions, Allows You Get into Those Difficult Places and Get the Job Done Easier and Quicker. [Scope of application]: This Screwdriver Flexible is mainly used in narrow spaces where computer case, electric cabinet, furniture, electrical appliances and other screwdrivers cannot work in normal operation.