Founded in 1843, Stanley Black & Decker Company has been producing hardware accessories since 1896, and has now become the world's largest manufacturer of fastening tools, known as the "king of hardware in the world". Since its listing on the New York Stock Exchange in 1966, Stanley has been one of the S&P 500 companies in the United States. Stanley's products are well-made and reliable. The hexagon wrench is made of S2 high-grade alloy steel, the hardness and torque are much higher than that of chrome-vanadium steel, and the price of a 9-piece set of ball head hexagon wrenches is about 70 yuan. A 10-inch (25cm) wrench forged from high-carbon steel costs about 50 yuan, while a 10-inch plastic-stained chrome-vanadium steel wrench costs around 80 yuan, and the price is at a medium level.