The Gold-N-Rods are lightweight and very strong. The spline design eliminatesbinding and friction, and the non-metal construction prevents radiointerference. These are very easy to install and easy to adjust, and they alsoutilize temperature compensated materials to minimize thermal expansion. Theseare for large models or high strength applications. They use 4-40 hardwareand are for uses where turns are slight or the length is over 48". The teststrength is 80 lbs. and the clevises are not included. The overall length is36".