NIKATTO Hex key sets, also known as Allen key sets, are essential tools for various mechanical and DIY tasks. These sets typically include a range of hexagonal-shaped keys, each with a different size on either end, catering to various bolt and screw sizes. The hex keys are made of durable materials like hardened steel, ensuring longevity and reliable performance. The compact and organized nature of these sets makes them convenient to carry and store, making them a popular choice for professionals and hobbyists alike. 
Whether it's assembling furniture, working on bicycles, or tackling machinery repairs, having a 20-piece hex key set provides versatility and precision, allowing users to efficiently handle a wide array of fastening applications with ease.