Rugged Equipment Extra Durable Cordura Cases. Rugged Equipment accessories work as hard as you do. They're constructed using the most durable components. Our new Rugged Equipment Quad-Lock clip is the first metal clip on the market to incorporate features like a true mechanical release operation with a 4 position detent system. The new mechanism allows the phone to release from the clip only when activated by the user. The detent system allows your phone to rotate and still be detained in one of any four positions.