Knipex 98 99 11 S5 KN | 10 Pc Socket Set, 1/2" Drive, SAE, 1000V InsulatedKnipex 98 99 11 S5 KN 10 Pc Socket Set, 1 2" Drive, SAE, 1000V Insulated A Socket Set is a comprehensive collection of tools used to tighten or loosen fasteners such as bolts and nuts. It typically includes a variety of sockets, a ratchet handle, and sometimes additional accessories like extensions and universal joints for versatility in various applications.