|Founded||Los Angeles, California, United States (1907 )|
|Headquarters||New Britain, Connecticut, United States|
|Parent||Stanley Black & Decker|
Stanley Proto—more commonly known simply as Proto and historically known as Plomb—is an American industrial hand tool company. It is a division of Stanley Black & Decker. The company is credited with creating the first combination wrench in 1933.
Proto was founded in 1907 by Alphonse Plomb, Jacob Weninger, and Charles Williams as the Plomb Tool Company, a small blacksmith shop making chisels in Los Angeles. In 1933, Plomb released what is commonly credited as the first combination wrench.
Plomb acquired a number of companies during the 1940s, including Cragin Tool of Chicago, Illinois in 1940, P&C Tool of Oregon in 1941, Penens Tool of Cleveland, Ohio in 1942, and J.P. Danielson of Jamestown, New York in 1947. Penens Tool would produce tools under the Fleet and Challenger brand names after its acquisition.
In 1946, Plomb was sued by another tool manufacturer—Fayette R. Plumb, Inc., now a brand of Cooper Hand Tools—for trademark infringement. The company began manufacturing its tools with the Proto name, a portmanteau of "professional" and "tools," in 1948. In 1957, the company began operating as Pendleton Tool Industries.
- "Plomb: A Gallery of Tools". Alloy Artifacts. p. 2. Retrieved 2010-01-31.
- Stanley Proto. "Company History". Retrieved 2014-03-14.
- "The Proto Empire". Alloy Artifacts. p. 1. Retrieved 2014-03-14.
- Lamond, Tom. "Fayette R. Plumb Co.". YesteryearsTools. Retrieved 2010-03-27.
- "CORPORATIONS: Plumb v. Plomb". Time. 1948-12-06. Retrieved 2010-03-27.
- "Plomb: A Gallery of Tools". Alloy Artifacts. p. 1. Retrieved 2010-01-31.
- Thomas, Bob. "Company History". Retrieved 2010-01-31.