Professionals worldwide prefer Proto Industrial Tools for their outstanding quality durability and dependability. Professionals for heavy-duty industrial applications including auto-manufacturing plants steel and airplane manufacturing chemical plants refineries general manufacturing transportation and fleet maintenance for trucking transit and aircraft use Proto Industrial Tools. With a global distribution network Proto Industrial Tools are available on-the-job anywhere in the world. The TorquePlus internal design minimizes fastener rounding, helps to extend fastener life, and allows the user to more easily turn worn, rounded, or rusted fasteners .Proto Impact Sockets are ideal for use on stubborn or damaged fasteners, and also on fasteners made from soft materials .The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners