Each Strongarm lift support is custom engineered, and manufactured beyond industry standards to provide smoother operating, and longer lasting performance. Lift supports should be replaced in pairs to ensure safe, reliable support of your hood, hatch, or liftgate. When failed lift supports can no longer support a hatch, cover, or lid, a dangerous condition can exist leading to serious injury. Our lift supports are designed to replace a failed unit quickly and easily or make easier operation of everyday activities. No special installation tools required.