The Bully Ball Mount Back-Up Light is a simple to install and simple to use lighting device that will make hooking up your trailer a breeze. You won't believe how much easier and safer it will become having this product attached to your truck! Mounts in seconds to any 2" ball mount with just the turn of a screwdriver, no drilling! Constructed of high-impact ABS for long lasting use the Bully Ball Mount Back-Up Light comes complete with wiring harness and can be wired for a temporary or permanent rear light source. Can be activated when your truck is put in reverse and also has an easy on/off switch. If you pull a boat or trailer this is a must have product.