McMaster-Carr develops products that are used to maintain, repair, and operate manufacturing plants and large commercial facilities. The company’s product categories include pipes, tube and hose fittings, pumping and filtering, process control and instrumentation, plumbing and janitorial machinery maintenance, measuring, leveling, and inspecting, heating, air conditioning, and ventilation, lighting and electrical, power transmission, fabricating, cutting and sawing, machining and clamping, abrasives, finishing, and parts treating, material handling, storage hand tools, hardware fastening and sealing, raw materials, and protective clothing. McMaster-Carr was founded in 1901 and is headquartered in Elmhurst, Illinois, United States. The company has distribution branches in Robbinsville, New Jersey; Santa Fe Springs, California; Atlanta, Georgia; and Cleveland, Ohio.