<p>100% MONEY-BACK GUARANTEED & LIFETIME WARRANTY: Our customer's satisfaction is our main priority. Shop with confidence!INCREASES THE SAFETY OF CHILDREN: Keeping an eye on small children no longer needs to be a stressful event. The locks intelligent design allows you to install the lock at the desired height to secure and prevent small children from opening the sliding glass doors on their own and exposing themselves to potential danger found outside the home.NO NEED TO WASTE HOURS OF SETTING UP : The lock's Intelligent design makes it EASY TO INSTALL AND USE. It fits easily within the limited space available between the sliding glass door frame and the interior of the door panel allowing the lock to disappear within the frame while providing maximum home security. A step-by-step instruction video is available on our main website, and printed instructions come with the product.The Double Bolt Lock is the most secure and easiest way to prevent your children from wandering outside the house. Its innovative system allows you to install the lock at the desired height preventing children from reaching and escaping into potential danger. Due to its unique design and operation, any occupant within plain view of the Double-Bolt Lock could determine whether the lock is Open or Secured. The Double-Bolt's primary function is to protect your home or property from intruders. The Double-Bolt Lock has proven to provide over 1000 lbs. of Forced Entry Load Tension, preventing criminals from being able to lift out the sliding glass door from their tracks. This type of high security is something factory-installed locks or after-market products cannot offer. The Double-Bolt Lock's sleek, aesthetic, and low-profile design helps fit easily within the limited space available between the sliding glass door frame and the interior of the door panel, allowing the lock to disappear within the frame and window environment. The Double- Bolt lock is for everyone who owns a home or business.UNIVERSAL FIT: The lock comes with the hardware needed to fit most sliding glass doors with a dimension of at least 4.7 cm of width length of the door frame. For doors that meet in the middle, purchase our 100% MONEY-BACK GUARANTEED & LIFETIME WARRANTY: Our customer's satisfaction is our main priority. Shop with confidence!interlocking latch found in our amazon store.</p>