[Heavy Duty Carbon Steel Material] This self-locking gate latch is made of heavy duty carbon steel material which is sturdy and durable. Also,the self-locking gate latch is galvanized and coated by premium quality black powder which is corrosion resistant for years using. The pull wire and spring are made of stainless steel. With these good quality material,it is suitable to installed indoor or outdoor for side door,front door,single door,privacy door.[Easy to Install] This self-locking gate latch is easy to install which features a fixed surface door locking. Also the gate latch kit comes with all the installing accessories which is easy and convenient to install. The spring enable us a easy way for opening and closing with no effort.[Install to Wooden Vinyl Fence Door ]This fence gate latch fits various material doors to install such as wooden,vinyl doors or fence. Also,we can replace to use professional hard screws installing the fence gate latch to aluminum alloy doors or metal doors.[Wide Application] This self-locking gate latch is suitable for gardens,vegetable farms,orchards,backyards,decks,sheds,pool gates,yard fences,chicken door,stables,etc which prevents strangers get in or pets and poultry gets out ensuring a security.