The Klein 68400 is a 7-piece open-end and box combination wrench that comes in a set. These combination wrenches are designed for tightening or loosening bolts, especially in confined working areas. They are made of the highest quality alloy-steel for strength and better hardenability. They are also nickel-chrome plated for added durability and is corrosion-resistant. This set also comes with 7 combination wrenches, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", and a carrying case. Klein Tools is the world leader in the design and production of quality products. In cooperation with Klein Tools, we at PlumbersStock carry high-quality and reliable products for a very affordable price. Grab yours now here at PlumbersStock.