2PC Magnetic Cool Tool LED Lights 2 LED light uses magnet as on/off switch. Once the light comes in contact with metal from any tool you wish to use it on the lights will illuminate. The light is perfect for screwdrivers, wrenches, sockets, ratchet accessories, pliers, etc. With the compact design you can illuminate any work area whether in the home or garage. Affix to any piece of metal and you have a mini flashlight as well.