Enhanced security and privacy: If you're one of those who don't trust hotel doors and locks, Gooriinet's portable door locks will provide you with extra security and privacy, ensuring you're safe, especially when traveling or staying in a hotel alone. Add an extra lock that's small but keeps your door securely closed and gives you a peaceful sleep. The door cannot be opened from the outside, not even with a key. Fits most doors: 3-in-1 special design fits most types of door locks. Perfect for hotels, bedrooms, apartments, bathrooms, living rooms, or private spaces. Door locks can also be used to prevent pets from escaping and to stop children from opening doors for strangers. Not suitable for sliding doors, double doors, curtain doors, or outward-opening doors. Easy to use: The hotel security door lock is easy to install or remove without any tools. The lock is compact and lightweight compared to other portable locks that can be carried in a pocket or handbag for self-protection. It applies only to doors that open inward and the door gap must be over 0.12 inches to ensure the simple door doesn't get stuck. Doors without a gap cannot be used. Heavy-duty lock: Anti-theft door units are made from solid metal that is durable and long-lasting. 304 stainless steel precision casting thickening is strong enough to prevent bending under pressure. Significantly improves security and prevents unauthorized entry.