The product is made of thick, stamped stainless steel plate, ensuring a longer lifespan. It provides added security for residential and apartment doors. It is anti-theft and offers significantly increased security, and can be installed on the door of a house or hotel. Made of stainless steel, guaranteeing quality and longevity even in humid weather. Durable, long-lasting, and easy to use. Leave the door open up to 2 inches for ventilation or viewing before opening it if you don't have a peephole. You can open your door without fear of someone trying to force it open. An advantage of this type of latch is that it prevents unauthorized entry because it makes a lot of noise when someone tries to open the door. Complete Fittings – All fittings are supplied with color-matched screws. Please refer to the images for the actual dimensions of the door lock chain.