PROTO is a leading manufacturer of heavy-duty industrial hand tools, including torque wrenches, IMPACT sockets, and pliers, operating as a brand of Stanley Black & Decker.
PROTO Industrial Tools is a premier global provider of industrial-grade hand tools, storage solutions, and torque measurement equipment. Originally founded as the Plomb Tool Company, the brand has built a century-long reputation for durability, precision, and safety.
Now a business unit of Stanley Black & Decker, PROTO serves demanding industries such as aerospace, energy, petrochemicals, and heavy manufacturing. Their product lineup includes high-strength impact sockets, precision torque wrenches, master sets, and tethered tools designed to prevent drops in critical environments.
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PROTO Industrial Tools typically offers a lifetime warranty against defects in material or workmanship for most hand tools. Torque wrenches and torque multipliers usually carry a one-year warranty, with calibration warranted for 90 days. Always check specific product documentation.
PROTO recommends annual recalibration for torque wrenches. Services can be performed at the PROTO Authorized Repair Center (e.g., in Conyers, GA) or other designated service locations found on their official website.
You can contact PROTO customer service by calling +1 800-800-8665 (1-800-800-TOOL) for assistance with service requests, warranty claims, or product information.
PROTO is a business unit of Stanley Black & Decker, Inc. Many of their tools are manufactured in the USA using global materials, specifically designed to meet high industrial standards.