DRIVETOL

Proto Tools is an American industrial hand tool company. Founded as Plomb, it is presently a division of Stanley Black & Decker. The company is credited with creating the first combination wrench in 1933. Use extensions to gain access to fasteners in locations that would otherwise be difficult to reach. Male square is oriented in line with female squares for use with fixed head torque wrenches. Full chamfer at drive opening (when applicable) for easy engagement with drive tools.