The Wiha International 01128 is a 5 mm hexagon wrench key with an overall length of 83 mm. It is made from a strong, durable, heat-treated, chrome-vanadium steel and is suitable for a variety of fastener applications. The key features a black phosphate finish and a slim profile to provide a tight fit when working in confined spaces. It also features an easy-to-grip, contoured handle for a comfortable grip. This key is designed to meet or exceed the standards of industrial quality.