TOGU Solid Die-casted Sus 304 Stainless Steel Thicken Security Door Guard,Gate Latches Swing Bar Door Guard,Burglar-Proof Padlock Door Clasp For Home,Apartment,Hotel,Motel,Dormitory,Satin Nickel Be used as a secondary or additional safety feature for hinged swing-in doors,it offers great protection for forced entry since this mechanism surely would have added time to call the police and prepare to defend yourself.In case of emergency it wont take them long to figure out how to unlock. TOGU security door guard are all machined from top grade solid stainless steel with Perfect surface treatment,anti-rust,durable and strong.Passing 72-hour spray test while the industrial standard is 24-hours,our products offers a longer life span for 8-10 years in normal conditions. Comes with rust-proof screws for installation.Constructed from stainless steel,this will provide extra strength so it will take longer time when someone force to break in,buying extra precious time to defend yourself.Screws are long and sharp enough to be mounted on the door easier. Allow door to be opened up to 2" for ventilation or viewing before opening the door if you dont have a peep hole.You can open your door without worrying that someone can try to push the door in on you.Benefit of this over other latches is that it keeps children from leaving the house without permission since it makes quite a noise when children try to open the door. This great small device can moves 180 smoothly and notches in place which is convenient so it doesnt swing around easily,you just close the door,swing the latch,then the door guard locked.And its unnecessary to worry about it will have a risk of ever locking itself somehow if you slam the door.