BAHCO 1000 volt 19 millimeter T handle socket wrench is used for protection against inadvertent shock when working on circuits up to 1000V. The overall length is 7 3/4 inches. There is a three layer coating insulation with different colors plus a forth one in black to further protect handle edges. Red is safety, orange is danger, and yellow is high danger. It is constructed of chrome vanadium steel. The socket end is 6 point and has a dynamic drive profile.