Dip-coated insulation with an insulated straight knife Three-layer safety insulation marked with color codes As per IEC 60900, for operating on live equipment up to 1000 V Three-blade straight edge; multi-layer coating; distinct colors denote low, moderate, or high danger. additionally a fourth in black to further shield the handle edges This establishes a visual warning system in addition to offering protection. The user will be alerted if the outer layer of insulation is damaged because the lighter color underneath will show through. At the conclusion of the manufacturing cycle, every single tool is tested to 10,000V for 10 seconds.