[Security door lock]: This is an additional door lock to ensure the privacy and security of the hotel and apartment, and prevent unauthorized entry into the bedroom. [Easy to use] The portable door lock is easy to use. No need to nail or screw in anything, insert the claw into the door lock hole, align the lock core with the hole, then close the door, and insert the red handle into the lock position. [Multi-scene application]: Our door security locks are called apartment door locks, hotel door locks, travel locks, room door locks, which are very suitable for hotels, dormitories, apartments, short-term rentals, airborne beds, bathrooms, bedrooms orprivate rooms. It can also be used to prevent pets from going out and prevent children from opening their doors to strangers. [High-quality material]: The portable travel lock is made of heavy-duty stainless steel and plastic. The surface feels very smooth, and the accessories are wrapped in ABS material, which can avoid any damage when using the door lock. [About our portable lock]: The package is equipped with two lockers, you can use one for apartment doors or room doors, and the other for travel or hotels. Size 4.3 x 1.2 x 0.4 inches (about 10.9 x 3.2 x 1.0 cm), light and small, you can put it in yourpocket or handbag. Only applicable to swing doors with spring bolts less than 1.1 inches (approximately 2.8 cm), not applicable to sliding doors, double doors, slatted doors and swing doors.