The Mag Lead from Electronic Specialties, Inc., features a magnetic disconnect near the test probe end. Just disconnect the test probe and you can "stick" it to any metallic ground or test point. You wont have to walk to your tool box to get your alligator clips. It is very helpful for automotive reference points and troubleshooting. The Mag Lead eliminates the need to hold probes while shecking or monitoring a signal. It has two high power, low resistance magnets that hold the probe to the lead.Teh Mag Lead stays put and wont fall off.