Support American craftsmanship with SK Tools. Shop our selection of tools proudly made in the USA for professional-grade reliability. SK was founded as the Sherman-Klove Company, specializing in screw machine products, by Mason H. Sherman and Noah Grover Klove. The company was founded in the early 20th century to supply munitions in World War I, and made mortar housings in a screw machine plant on Harrison Street in Chicago. As the holding company of SK Group, SK Inc. manages its investment portfolio while operating its AX business. In portfolio management, the company drives growth through a disciplined approach of selection and focus, aimed at enhancing corporate value. SK Group (Korean: SK그룹; 에스케이그룹) is a South Korean multinational manufacturing and services conglomerate headquartered in Seoul. A chaebol (Korean family-owned conglomerate), SK Group is the second largest such conglomerate by revenue in South Korea, after Samsung Group. SK Tools deliver pro-level precision without the bulk. Lightweight but powerful—perfect for home projects. SK Tools makes every task feel easier. SK Battery America is one of the global leading battery manufacturer for EVs. Explore SK's complete range of tool sets. From combination wrenches to socket sets, find everything you need for maintenance and repairs. SK is a global leader driving economic and social prosperity through innovative solutions. Discover our cutting-edge companies and sustainable practices. Find the latest SK hynix Inc. (SKHY) stock quote, history, news and other vital information to help you with your stock trading and investing. SK opened the $2.6 billion battery plant in Commerce, Georgia, in January 2022. The Korean company notably supplied the Ford F-150 Lightning electric pickup truck.