MSC Industrial Supply distributes metalworking and MRO products to manufacturers across North America. Customers range from small machine shops to Fortune 1000 manufacturers to U.S. government agencies, sourcing cutting tools, abrasives, fasteners, safety supplies, power tools, and roughly 2.5 million other industrial SKUs. MSC sells through a direct field sales force, customer care centers, and its B2B e-commerce site, mscdirect.com, with about 64% of orders placed digitally. MSC makes money on the spread between supplier costs and customer prices, with gross margins around 40-41%. Beyond simple distribution, MSC embeds itself in customer operations through vending machines installed at customer sites (over 29,600 machines) and in-plant programs where MSC manages MRO procurement on the customer's behalf (411 programs). These two programs together represent roughly 40% of total sales and create switching costs that make customer relationships stickier. MSC serves three customer groups: core customers (small- to mid-size manufacturers), national accounts (Fortune 1000 companies, lower margins but high volume), and public sector (federal, military, and state/local agencies). MSC argues it differentiates on metalworking technical depth, employing over 160 specialists who conduct on-site assessments. MSC's private label products, roughly 15% of sales and concentrated in cutting tools, are manufactured domestically. MSC generates strong free cash flow and returns capital to shareholders through dividends and buybacks, while selectively acquiring businesses to deepen metalworking expertise or expand into adjacent categories.