GTR Lighting Universal LED Bolts: These bolts feature modern Samsung 2835 LED chips for super high light output and unsurpassed reliability! Perfect for MANY applications such as trailer lighting, audio-install accent lighting, custom DRL lights on the front bumper, or ANYWHERE that you need more light! Simply drill a small hole where you want the light to mount, and it's assembly IS the bolt. The wiring runs through the hollowed out mounting stud and allows you to mount lights where you never could before.