Mini Back Probes/wires Piercers Avoids poking holes in the wire The small diameter probe can slip into the back of the wore connector and make connection with the signal under test Although piercing the wire is not advisable, sometimes it just cannot be avoided This set of probes can work with most standard test lead kits in the field Great for back probing weather pack style connectors used with numerous automotive sensors Also very handy for piercing and tapping readings on smaller gauge wires using the included probe adapters Works with most Test Lead Kits in the field with standard 4mm banana plug test lead Test probes 21 mm- lengths 618 Prop65 information pending -