Home Security & Toddler Proof Security door latch lock 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 childrens reach so they cant open the door by themselves, providing additional child-safe door security. size The length is about 4.10 in and the width is about 2.48 in. please refer to the product size picture for details. Advanced Craft Features Security door latch lock features steel ball positioning which is a unique locking design that holds locking arm in place so they will not swing around for extra security. The countersunk hole design makes the security guard lock noble and elegant. A must-have door stoppers security bar for every home. Rugged and Durable The security door latch lock is made of high-quality and solid zinc alloy with beautiful polishing and finish to complement your lovely home decor. Door locks are difficult to rust or oxidize and will serve longer life. Ultra-thick swing arm and solid lock base ensure strong and durable quality. Home security door lock can be unlocked easily from the inside with simple swinging motion, while too strong to be forced open from the outside. Easy to install and Maintain Please make sure your door frame is flush! The security door latch lock is attached to the mounting screws. Simply use your drill to mount the security door latch lock to the door, cabinet or window. Package Included 2 Security door latch lock, 18 screws.