The package includes a security lock. Easy to install: Simple to install and remove in seconds without tools. Insert the claw into the door striker, hold the lock in place, close the door, then insert the metal half-moon into the hole near the door to secure it. Room security: This portable door lock is ideal for travel, providing added room security. Lock the door from the inside to prevent outside access, helping to deter unauthorized entry and enhance personal safety. High-quality material: Constructed from stainless steel for strength, durability, rust resistance, and long-term use. Compact and portable: Lightweight and compact design makes it easy to carry. Suitable for travel, business trips, vacations, and other outings. Wide range of applications: Compatible with various bolt sizes and inward-opening doors with gaps greater than 1.5 mm. Ideal for apartments, dorms, hotels, and short-term rentals, offering extra peace of mind and security.