This Teng Deep Impact Socket Set is specifically designed for use with power tools and air tools. They are manufactured in chrome molybdenum in accordance with GGG-W-6608, these sockets ensure the highest quality. Each socket is size marked for easy identification. This 8-piece set of 3/8-inch drive impact deep sockets, supplied on a clip rail. comprises 8mm, 10mm, 11mm, 13mm, 14mm, 16mm, 17mm and 19mm.