High quality material: stainless steel solid safety sliding latch door chain guard choose SUS304 stainless steel material punching forming, have quality feel surface smooth, corrosion resistance, prevent birth rust; with really excellent black electroplating layer, elegant, beautiful, gentleman Product size: extra thick door security chain: 1.2 mm thick, heavy duty, door lock: 98 x 45 mm (L x W), welded steel chain: 210 mm (long), 100% durable. Makes the thickened and widened chain and trim of this door lock very solid Safety protection: you can unlock the door chain lock from the inside, while it cannot be unlocked from the outside, making you feel much safer in your home. You can also identify a caller before the door is fully released. (Suitable for living room, apartment and hotel doors, it offers you additional security) Double security: spring handle for safety device added, the spring handle on the door latch must be raised to open the door lock. This means that the door lock can only be opened from the inside and not from the outside. Spring handle increases safety and provides reliable burglary protection. Safer Design Easy to install: chain door guard can be used for wooden or metal doors on a variety of door types. It can be placed above or next to the door panel. This latch is very easy to install and solid. It has all the mounting elements required for complete installation. No additional screws are required with four included fixing screws Name: anti-theft door bolt door chain set. Colour: black. Material: 304 stainless steel. Weight: 206 g. Box contents:1 x door bolt door chain base plate. 6 x screws..Products from KJ's store