Schützinger Probe & Test Leads Safety test probe 615203 - Schutzinger SPS 8034 Ni / RT, The Schützinger SPS 8034 Ni / RT safety test probe features a 4 mm socket and comes in a red finish. This spring-loaded test probe is designed for secure and reliable electrical testing, ensuring precise contact. It is typically used in safety testing and measurement applications across various electrical environments. Schützinger SPS 8034 Ni/RT Safety Test Probe 4 mm Socket Red