Quality Material: Made from sturdy carbon steel with Electrophoresis processed black coating. Original spring length 25cm/10in. You can adjust spring tension with the included adjusting pin to control door closing speed. Versatile Application: Can be used for left and right door opening. Suitable for light to heavy duty gates, garden fences, agricultural fences, household doors, and various wooden doors. Easy Installtion: This gate spring closer is very easy to install. Fasten one end to the door with included screws, and the other end to the post. Install at a near-vertical angle, rather than horizontally. Installation Tips: Use the metal bar to tension the spring. If your gate is closing clockwise, then twist the spring anti-clockwise. Please do not tension it too tight, otherwise the gate will slam with too much force. This package includes 1 gate spring closer, 2 locating pins, 1 metal bar and 4 screws for convenient installation., Weight: 1.12656215882 Pounds, Manufacturer: QWORK