Ridgid 20973 SeekTech 4-Inch Inductive Signal Clamp Allows users to apply a signal to a cable or pipe when direct connection is not possible, and is compatible with all RIDGID transmitters The 16-foot cable neatly rolls and stores in the clamp jaws between uses to prevent cable damage Once the signal is applied to a conductor, it can be traced using a compatible receiver such as the SeekTech SR-20 or SR-60 making an all-around ideal pipe locator The 4-3/4-inch Inside diameter makes it ideal for use with cable or pipe 4 inches (100 mm) or less in diameter The lightweight inductive clamp stores securely in most RIDGID locator cases making it handy during pipe location Two built in LEDs Integrated adapter allows users to attach a hot stick for out of reach lines Weighs 1-7/8 Pounds Four inch clamp Full lifetime warranty