The KidzLock two-way, keyless entry, child safety door lock systems are a revolutionary, patented design, specifically for child safety. There are KidzLock models for both hinged doors and sliding doors. You can use KidzLock to safeguard small children by restricting their access to virtually any doorway in your home—both interior and exterior. Moreover, because KidzLock is completely keyless to operate and virtually effortless (and simple) to use, adults are not locked-out or shut-in from either side of the door with KidzLock systems.