Knipex 98 37 16 KN | Hex Socket, 3/8", 16 mm, 1000V InsulatedKnipex 98 37 16 KN Hex Socket, 3 8", 16 mm, 1000V Insulated An Insulated Socket is a specialized tool designed for safely working on electrical systems and components, particularly in environments where there is a risk of electric shock. These sockets are constructed with a non conductive insulating material, typically a high dielectric plastic or rubber coating, which covers the metal body to protect users from electric currents up to a specified