Made of carbon steel with ergonomic and non-slip handle, solid and durable Efficient and practical: the light weight system allows one-handed use therefore saving strength Two universal wrenches that adapt to all kinds of screws and nuts and automatic technology that allows them to automatically adapt to different sizes Using this set is the right solution to fix your faucet, valve, pipe and pipe, radiator, boiler and impeller problem Adjustable large wrench - length: 280mm, weight: 380g, opening size: 23-32mm, small wrench adjustable - length: 210 mm, weight: 180 g, opening size: 15-22 mm and 9-14 mm Adjustable Multi-Function Nut Wrenches 2-piece Universal Wrench Kit Affordable Reliability, Re-Innovation Our sole purpose is to create quality tools at incredible value We are in business to bring affordable reliability to the world of tools A professional tools brand which belongs to Hangzhou Great Star Industrial Co., LTD. It aims to offer high quality products for all DIY technicians and hobbyists. With ergonomic design, solid and durable quality, innovative and popular style, and distinctive brand feature, has gained worldwide recognition Material: Carbon Steel Big Wrench adjustable - Length: 280mm, weight: 380g Adjustable small wrench - Length: 210mm, weight: 180g Opening size: 23-32mm (large) Aperture size: 9-22mm and 6-15mmsmall ) Hardness: 38-48HRC Two universal keys that fit to all kinds of bolts and nuts Efficient and practical, with the light weight system, one hand movement is enough Ergonomic bi-material handle brings anti-slip experience and can saves force therefore elevating work efficiency The secret is the self-adjusting technology, which allows them to automatically adapt the size Ideal for assembly and mechanism repair, plumbing, carpentry and gardening Using this set is a good solution to solve your problem of faucet, valve, pipes, radiator, boiler and wheel