【Compact & Portable】Security door lock size: 8x3.5cm/3.14x1.37inch, compact size and light weight, easy to carry around, ideal for travel, business trip and vacation. You can carry the safety lock with you in the small cloth bag we give you as a gift. 【Reliable & Durable】The portable door lock is made of high quality stainless steel material, strong and durable, rust-proof, not easy to damage, can be used for a long time. 【Extra Security】This portable travel door lock adds extra privacy and security to your room, lock the door from the inside to others from opening the door from the outside and ensure security. 【Easy to Install】The travel lock is very easy to use, no need to use other tools, you can install it on your door in seconds, the improved door lock is suitable for all sizes of bolt door lock. You can refer to the explanation in the fifth picture. 【Wide Range of Applications】Whether you live alone or stay in a hotel, this security door lock will provide extra security. Perfect for apartments, student dorms, hotels, motels.