Made of high quality material, durable and practical to use. Application: It is used for mounting on a hexagonal tool in the installation of a pneumatic screwdriver, electric screwdriver, pneumatic drill, electric drill pistol drill, manual screwdriver, etc. Can convert the original hexagonal shape into a square head size, thus Can be used for the installation of the sleeve, which is a good accessory for conversion., Manufacturer: Ruxyoie88