This socket adapter allow you to reduce of your sockets without increasing your tool height. The low allows for use in a wide range of applications. Designed for impact or hand tool use. Made from high-strength, heat-treated Chrome steel and are treated with a Manganese Phosphate coating to resist . Great for working in tight areas. This adapter feature a magnet retention device to keep them attached to the socket. Adapter can be stacked if additional drive reduction is, Manufacturer: Jnchdghwa