This tiny electrical component in your back pocket can mean big savings in your front pockets! The list of uses for this little inductor is endless. But, no matter how you choose to use it, you WILL save money. Used to filter out most radio frequency noise this choke can be used to build or repair radios, to repair automobile electrical glitches and for many other DIY projects. But, far and wide the most commonly used purpose for this unassuming part is to attempt to locate a broken wire in a number of underground fencing brands. This kit may be compatible with finding wire breaks in brands such as Innotek, Petsafe Invisible Fence, Sportdog and others. It simply takes this 100uH RF Choke, a good quality AM/FM radio(Not Included) and the included Pocket Instructions. **NOTE:we want to be clear, this is a low cost electrical hack and is not the official way to locate a wire break in any brand, nor is it guaranteed to work to find a wire break in all brands of underground fencing. However, IT IS a possible $25 alternative fix to a $200 one.