Fasten your C02 Cars to this fishing line by using our Screw eyes (19-54-1024) to make sure your car stays on track. Tie one end of the fishing line to one side of the gym/class and the other to your launcher. Fasten two screw eyes to the bottom of your car (front and back) and place the car on the filament before launching. Your car will then follow the length of the line and not veer off track. 183 m, 3.6kg, 200 yd