Home and Hotel Security This portable door jammer is a heavy-duty security device designed to prevent forced entry, making it ideal for homes, hotels, apartments, and public buildings like schools and offices. Easy Installation No tools are required. Simply fit it in the gap under an inward-swinging door and adjust the foot for a secure grip on the floor. In emergencies, it can be quickly released with an upward motion. Make sure to test that the door stopper is firmly in position. Upgraded Door Jammer Constructed from thick aluminum alloy, this durable door stopper is designed to resist cracking. The high-quality rubber base provides strong grip and is wear-resistant. The design effectively uses force displacement to block the door against forced attempts, enhancing your safety. Convenient to Carry This compact security door stopper comes with an additional storage bag, making it easy to take on business trips and travels��simply slip it into a bag or pocket. Compatibility This door stopper is suitable for door gaps of 0.12-1.38 inches (3-35mm) and door thicknesses of 1.18-1.97 inches (30-50mm). It works on various floor types, ensuring stability under pressure on carpets, tiles, and composites.