The Klein 70579 is a set of 5 folding hex key that is designed for screws with a hexagonal socket. This handheld tool set comes in handy and can even fit inside your pocket or in your toolbox to avoid losing it. It has the handle that serves as a holder that can help you do the job quickly. This tool also includes a five-key inch metric set: 3/16", 7/32", 1/4", 5/16", and 3/8". 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. Get yours now here at PlumbersStock.