1. The gas spring is used for upturning on wood or metal cabinet door, Sofa, Table, Bed, Chair,etc. 2. High quality hydraulic cabinet support/gas spring export all over the world. 3. It can not lock automatically when in using which is mainly used for support. 4. More advanced technology: Original GOOD gas and oil mixture one-step molding technology; 5. Make the stability and good product rate increased by over 30%. Welcome to visit our official website : http://www.hardwarepullhandles.com