Exterior Gate Torsion Spring Closers apply a ‘torsion’ force to your gate. Primarily used on Ornamental/Aluminum, PVC/Vinyl and wood gates requiring an automatic closing feature. The tension can normally be adjusted based on the gate weight. In some cases, a torsion spring closer provides additional force when using Single Action Spring Hinges that install mortised into the gate stile and jamb to allow for assisted closing of a gate.