W.W. Grainger, Inc. distributes maintenance, repair, and operating (MRO) products and services in the United States, Canada, Europe, Japan, Mexico, and internationally. The company provides material handling equipment, safety and security supplies, lighting and electrical products, power and hand tools, pumps and plumbing supplies, cleaning and maintenance supplies, and metalworking tools, as well as gloves, ladders, motors, and janitorial supplies. It also offers inventory management and technical support services.

The company provides its products through branches, sales and service representatives, contact centers, distribution centers, and catalogs, as well as through e-commerce platform. It serves small and mid-sized businesses, large corporations, government entities, and other institutions. W.W. Grainger, Inc. was founded in 1927 and is based in Lake Forest, Illinois.