The CO2 powered gun shoots a foam dart with a line attached to it up to 200ft. Stop climbing your ladder and moving it every ten feet to pull your wire across a t-bar ceiling. Pull your wire the entire distance in one shot with the Laserline. Fire the Laserline, attach your wire, then walk around and pull it across while standing. It's that easy. Features: Accurately install a pull line up to 200ft. Cuts labor costs and improves production. Ability to span over heavy and hard to move objects found in many commercial structures. Replacement line and darts available.