SK Tools USA, LLC traces its roots to the Sherman-Klove Company, founded in the early 1900s, and manufactures professional hand tools for American technicians. The brand is closely associated with its round-head ratchet, a design introduced in 1934, and now makes more than 1,500 products. Manufacturing and distribution moved to Williamsport, Pennsylvania, in 2021, where SK continues building on a century of toolmaking history.