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.
- Proto® Hex Bit Impact Sockets can be used on stubborn fasteners.
- Tight tolerances for snug fit on fastener.
- Hex bit impact sockets are used wherever powered drive tools are used to install or remove fasteners.
