CDI 511-9770 Piercing Probe SetFully insulated probes with spring loaded clamp. Probes with stainless steel pin self-centers and punctures insulation. Includes: 1 red & 1 black probe. Allows for a hands free operation while checking DVAFeatures: Piercing Probe Set; *Includes 1 Red & 1 Black Probe; Fully Insulated Probes with Spring Loaded Clamps; Probes with Stainless Steel Pin Self-centers and Punctures Insulation; Replaces: 511-9770;