The KC Tools half inch drive hex head socket extension bar measures 125mm, giving enough length when you need to access small, tight spaces. The extension bar feels incredibly light in your hands but is well balanced, so you can easily control it when needed. This tool is made from chrome vanadium steel, which is heat treated and with a chrome finish. This combination gives the extension bar incredible durability and resistance to rust or corrosion. It has a non-slip handle.