- United States
PROTO® Industrial Tools has been manufacturing hand tools in the USA for more than 110 years. From newly innovated intermediate sockets, wrenches, extensions, and ratchets, to torque tools and accessories, over 1,500 PROTO hand tools meet specifications mandated by the SAE International group of engineers (SAE AS954G, AS955, AS4984A, and more). These hand tools meet both dimensional and plating specs to help promote productivity, safety, and durability suitable for most industrial verticals. Aviation mechanics and engineers rely on PROTO for its next-level durability and quality standards necessary to perform in extreme conditions.
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