These are 12v Straight lighted bolts made from high grade stainless steel and polished to a mirror finish. The light shines brightly through the hex head opening. They can be used for many applications: gauge lights, indicator lights, underhood lights, accent lights, etc. They are 5/16"x 3/4"polished stainless steel button head bolts and are sold in pairs. Easy to install,Use inside or outside vehicle Polished stainless steel Unlimited uses. These are available in White,Red, Amber, Green, Blue, and Purple.