The safety lock is a top-of-door lock designed to keep children safe by being completely out of their reach. Unlike door knob covers or handle locks, the is mounted on top of the door, making it inaccessible to . A metal screw and peg are inserted into the door frame, allowing the to slide over the peg and lock the door from either side. Suitable for both exterior and interior doors, this lock is made of durable, weather-resistant painted metal, ensuring long-lasting use. The fits various door thicknesses, accommodating most doors up to 1-3/8 inches thick (or up to 1-13/16 inches if you remove the spacer bar). Perfect for French doors, basement doors, pantry doors, bedroom doors, and more. The is an effective solution for babyproofing and -proofing, providing a reliable alternative to door alarms and other safety devices. ENSURE YOUR DOOR TYPE & THICKNESS IS BEFORE PURCHASING THIS 4-PACK. Fits most hinged doors up to 1-3/8” thick (or up to 1-13/16” thick when 's spacer bar is removed). Suitable for interior and exterior doors, French doors, and doors with knobs, levers, or large/unique handles. NOT suitable for any sliding door on a track, such as bifold, pocket, or sliding glass doors. Also NOT suitable for patio screen doors, storm doors, metal door frames, or double doors that swing both ways. REQUIRES DRILLING SCREW (INCLUDED) INTO DOOR FRAME. When installing on exterior doors, the screw will be drilled on the outside part of your door frame. The can still be operated from both sides. Ensure you can reach the top of your door to slide the . MADE OF STURDY METAL THAT WON’T BREAK LIKE PLASTIC. is the only childproof door lock of its kind made from durable, painted metal instead of cheap plastic. It will keep your safe for years to come. Use it to babyproof all the doors in your house, including the pantry, office, bedrooms, front and back door, and basement. ADULTS CAN OPERATE FROM BOTH SIDES OF THE DOOR. You won’t get stuck on side of the door while your is on the other. (This is a problem with other door handle childproof locks.) Also, you can disengage the if you don’t need it locked for a while - allowing you to operate the door normally until you need to lock it again. CHILDREN CAN’T REACH IT SINCE IT SITS ON TOP OF THE DOOR. Unlike other childproof door lever locks or knob covers, the rests on top of your door like a saddle, keeping it out of reach of toddlers and children. It is also designed to blend seamlessly with your home décor. Most guests will not notice it’s there.