Why it is necessary ---Prevent the baby from closing the door and accidentally pinching his fingers; Prevent the baby from accidentally locking himself in the room; Avoid the door closing suddenly and making a loud noise to wake the baby up. Premium Quality---The lock uses high-quality TPR and ABS materials, which is safe and durable. The ground contact part is made of TPR for greater friction. The ABS material is stable and durable, not easy to damage, and can be used for a long time. Wide Application---Door stopper can be used on most floors. Whether it's concrete, wood floors, ceramic tiles. Instructions for Use --- Simple to install, no need to fix screws, just paste according to the instructions to complete the installation. The installation requires the door gap height to be between 5 and 40 mm.