These unique, general-purpose test lead probes are insulated right down to the needle-sharp stainless steel tips. The durable sharp points keep the Microprobes where you want them and the 2000V insulation factor of the Kynar electrode coating helps you avoid shorting out the devices under test. Probe length retracted: 5.1"; fully extended: 7.6". Electrode's length 4.3"; diameter 0.058". Wire length 40" with standard banana plug.