Combines a hinge, door closer and hold open in one product Overall features: 1. Advanced engineering- 3-in-1 combines a hinge, a closer and a hold open in one product. 2. Zero maintenance- stainless steel construction, no hydraulics, no leaking oil. 3. Full adjustable- adjust closing force(0-6), adjust closing speed, installation complete. 4. Strength- door duty loading max. 240lbs (110kgs) 5. Durability- 1, 000, 000cycles testing, many years of maintenance free operation. 6. Code compliant- ada, ul listed r26997, ansi/bhma a156.17 grade 1. 7. Material- 304 or 316 stainless steel Suitable for outside door! A. Top cover- prevent from rain and dust. Open the top cover and then adjust closing force. B. 316 stainless steel C. Adjustable post- easily separate or connect posts to lengthen and shorten total length of posts to install on 2¡¨~4¡¨ gate size. Please contact us for more information. Sarah@waterson.Com