1、Good Conductivity: The back probe kit has excellent conductivity, which can assist instruments and equipment to read quickly and accurately 2、Durable Material: Banana plug test leads kit is made of PVC, copper, PA, durable and not easy to damage 3、30 Pieces: Test leads set contains 15 test probes, 5 4mm test Clips, 5 Test clip connections and 5 shell piercing probes 4、Back Probes:There are 3 different probe angles ( 90°, 135°, 180°) can meet your various testing needs 5、Size Parameters: The plug size of the rear probe test kit is 4mm and the jack size is 4mm, which is highly practical Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.