STURDY AND DURABLE: Our double-sided wrench, extension and socket sets are made of high-quality chrome vanadium steel with a perfect chrome finish for superior strength and wear resistance. Professional Ratchet Handle: The ergonomic ratchet handle with quick release allows you to comfortably reverse the switch and makes the product exceptionally durable. Includes 10 pieces of 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 mm Cr-V shells on 10 collection holders, each shell is sized for ease of use and organization. Extension Rod: The 100 mm long extension rod is also made of chrome vanadium steel and is ideal for working in hard-to-reach areas. Well Packaged: The set comes with a plastic storage holder to keep all your sockets organized and without mess. You will not be lost anymore. Ideal for home, metalworkers or carpenters, builders, garages, auto mechanics, DIYers.