Also known as Grid Rockets, these are small whistling rockets with a sparkling tail that run along a steel cable, attached to the line by a rocket holder.
The cable (not supplied) must be securely fastened at each end.
A 4 second line rocket may travel up to 50 metres in length. Quiet rockets are slightly less powerful and can reach up to 15 metres in length. Line Rockets take between 2 and 4 seconds to travel their distance. The distance travelled will depend on the angle and condition of the line it is on.