Easy to install: No tools required. Simple installation/disassembly takes only a few seconds, suitable for both young people and the elderly. Just insert it into the ga-p between the door and the floor (0.2 inches - 1.38 inches high), and turn the screws to fix it firmly. High-quality material: The material is made of high-strength aluminum alloy, and the one-piece molding can better resist the direct resistance of the ground, thus firmly supporting the door body. It is made of high-quality rubber material, which will not damage the door body and the floor. Portable: Weighing only 202 grams and measuring 12*9.4cm/ 4.72*3.7 inches, it can be easily put in a bag and carried around. It is very convenient whether at home, on a business trip or when going out. High universal compatibility: Suitable for all doors that open inward, adjustable telescopic feet are applicable to various scenarios such as tiles, wooden floors, concrete floors, and blankets, safeguarding your safety. Safety protection: Anti-picking design to prevent forced entry. The wear-resistant base is inlaid with anti-slip patterns, providing excellent grip and protecting privacy and safety.