Msc Industrial Direct Co., Inc.
A distributor of metalworking and maintenance, repair, and operations (MRO) supplies—cutting tools, safety gear, and similar goods—serving machine shops, factories, and facilities across North America through e-commerce, inventory management, and its iconic "Big Book" catalog. Founder Sid Jacobson started the business in 1941 as Sid Tool Company, selling cutting tools to New York City machine shops from his car using money borrowed from his mother. The MSC name came from a 1970 merger with the Manhattan Supply Company.