The sliding door lock developed and designed by ZRFCXE provides safer protection for your family, children, and pets. By locking the sliding door or sliding windows to prevent children and pets from getting out of the house, preventing the risk of falling from the height of the window, effectively avoiding stories. CHILD PROOF SAFETY DEVICE?Sliding glass door locks can control the partial opening or closing of sliding doors and sliding windows to prevent children from entering and exiting or falling accidents. Safety locks with cushioning and silent devices are proven to withstand the pull of babies and children, well Keep your baby safe. WIDE USAGE: Child locks are suitable for sliding windows, sliding doors,patios doors,closet doors,cabinet doors,etc.Provide more security for your baby and pets.?Please measure the door clearance before purchasing. The door clearance must be greater than 1.17cm/0.46inches for this lock to work on sliding doors.? SIMPLE INSTALLATIONL?No additional installation tools or drilling required,3-step quick installation. Step1,Ensure that the door clearance is greater than 0.46 inch?Clearance less than 0.46 inches This lock cannot be used on sliding doors?. Step2,Clean working surface. Step3,Peel adhesive to stick Put it stick to the window or door, Waiting for 24 hours afterinstallation and it will be stronger. Done! EASY TO USE?ZRFCXE Sliding glass door lock 2023 upgraded security design,the lock is not easy to be opened or closed by the baby. Open the lock,pressing the buttons on both sides at the same time works, this door prevents sliding. If you need to close the door lock, press the lock cover and the sliding door will slide. AFTER-SALES SERVICE: The child safety lock is made of high quality ABS plastic, stainless steel spring and strong 3m adhesive. If you have any problems when using it, please feel free to contact us, we will reply you within 24 hours and will surely provide you with a satisfactory solution.