Automatic door closer comes with a detailed and clear installation manual and install fittings, provide you simple and smooth installation. Door closers bring ease and security to your life, protecting your doors and locks. Simple to operate and suitable for a wide range of applications. This hydraulic door closer is made of commercial grade aluminum alloy, hydraulic operated, totally automatic closing, speed adjustable Adjustable spring hydraulic door closer has 2 valves independently control the closing and latching speed. Easy to install and ready to use right away, it effortlessly meets your automatic closing needs., Manufacturer: BgnEhRfL