Small plastic pieces and many of the metals used in vehicles today are non-ferrous, and a magnet does not attract them. Our Mechanical Pick-Up is designed with steel fingers that are spring-loaded and will grip an item up to 1" in diameter. The closed diameter of the “jaws” is less than 3/8". The Mechanical Pick-Up is 24" long, has a flexible shaft and will reach into the deepest recessed areas to retrieve an item. Also features an LED light that runs on 3-LR41 batteries (included).