SNAP-ON INDUSTRIAL BRANDS 8162-1/2V EXTENSION 1000V-1/2DR 150MM

2 layer coating insulation with different colors plus a 3rd one in black to further protect handle edges. Red: safety. Yellow: danger. Material: Chrome-Vanadium steel. The male square drive has a slotted screw to move the ball outward or inward and block or unblock the socket to it. The male square tolerances and torque requirements comply with the respective ISO standard.