2 layer coating insulation with different colors plus a 3rd one in black to further protect handle edges on spanners from 6 mm to 16 mm. Red: safety. Yellow: danger 3 layer coating insulation with different colors plus a 4th one in black to further protect handle edges on spanners from 17 mm to 32 mm. Red: safety. Orange: danger. Yellow: high danger. Material: Chrome-Vanadium steel. Opening tolerance according to ISO 691
BAHCO 1000 volt 10 millimeter offset box end wrench is used for protection against inadvertent shock when working on circuits up to 1000 volts. The over all length is 6 1/4 inches. It features the two layer coating insulation with different colors. Red is safety and yellow is danger. 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.