Security & Privacy Swing bar door locks are security locking devices for swing-in doors, allow people inside the room to open the door few inches for identification or ventilation while providing privacy and security for guests and residents. Door latches also can be installed out of children's reach so they can't open the door by themselves, providing additional child-safe door security. High Security LockThis swing bar Lock is a security locking device for hinged swing-in doors, allowing a door to be slightly opened to allow safe viewing and ventilation. It is a unique locking design that holds locking arm in place so they will not swing around for extra security. Easy Installation The installation and operation is simple, you only need a screwdriver, after making the mark, tighten the door lock with screws. Three-speed Pinball PositioningBuilt-in spring pinball, which can open the positioning function at three different angles. MaterialThis reinforced swing bar door guard is made from alloy and stainless steel that can withstand enough force to preven t possible break-ins. Material: Alloy, Stainless stee Color: Gold Size: (Approx) L67mm/2.64inch, W:21mm/0.83inch, H: 110mm/4.33inch, Total H: 132mm/5.2inch, Thickness: 10mm/0.39inch Package Included:1pcx Door Lock 7pcs x Screws.Items from Sheng Xinshun's shop