CHILD PROOF SAFETY DEVICE Keep valuable belongings from young child proof sliding door or hung window with durable and effective lock. This kid stopper has been proven to withstand the pulls and tugs of babies and children, keep doors and windows opened in safe! SAFE DESIGN Unlike other sliding glass door lock, this sliding door child lock is installed beside door shelf and works once double buttons pressed simultaneously, which stops the door slided and passed each other. This lock is off to press the locking cover for unlock condition! STRONG DURABILITY Never worry about sliding window locks broken with high quality ABS plastic, stainless steel spring and strong 3m adhesive tap. The 3M window lock will not lose effectiveness or power even when you routinely open and shut your hung windows every day! SIMPLE INSTALLATION Installing sliding door lock has never been this easy, no drilling tools needed! Simply clean the working area for this lock, peel off 3M tape and stick this device onto the desired location of sliding doors for your patio, closet, cabinet as well sliding window! DURABLE LASTING WORK - We know that patio glass door lock will work perfect. In case that you are not satisfied with this sliding door stopper, It is welcome to let us know any time and the helpful solution will be provided in 12 hours. A good safe gift for the kids to get great benefits!