MRS-24 is the ideal tool to effortlessly fish wires through walls. 10 long ball chain can navigate through the wall with ease. Eyelet on the ball chain connects to most wires and 3/4" stop ring prevents it from falling into the wall. 24 flexible magnetic retriever has high strength neodymium magnets and can be bent into any shape to retrieve ball chain. Expandable retriever hook can extend up to 18 to grab the ball chain.