ESD hand tools have handles constructed from a special polypropylene material. This material allows the flow of electrical energy, but at a very controlled rate; •A rate that will not let sparks develop. The material used has to have been tested and certified before it can be claimed to be ESD compliant and naturally all C.K ESD compliant products use certified materials. The sign for ESD compliant tools is: International standard IEC 61340-5-1