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 its assembly IS the bolt. The wiring runs through the hollowed-out mounting stud and allows you to mount lights where you never could before.