Professional Child proof door knob cover lock designed for security and access control applications. Constructed from durable ABS plastic, this device prevents unauthorized access by completely covering the door knob and keyhole. Features a keyed-alike locking mechanism for consistent access control across multiple units. Ideal for property management, construction sites, rental properties, and temporary access restriction needs. Easy to install and remove with the provided key. Helps maintain security while preventing damage to existing door hardware. 【Wide Range Uses】Child proof door knob cover lock is durable and suitable for most round door knobs, not for lever door handles. It prevents unauthorized room entry, improving the security and privacy of your home. Also prevents water theft and unauthorized tap use 【Easy to Install】The door handle cover is easy to install, no special tools or expertise required. Just place the device on the door handle and lock it 【Prevents Getting Lost】Use our childproof door handle Cover to protect children and people with dementia from leaving the house unsupervised, giving you peace of mind while taking care of household chores or enjoying a moment of rest. It's ideal for keeping curious children and people with dementia safely indoors 【Easy to Carry】The door handle cover is designed with portability in mind. It is lightweight and small in size and can be conveniently stored in a drawer, bag or suitcase, making it a perfect travel companion. Securing your hotel room or vacation rental 【High-quality Material】The portable door lock is made of high-quality ABS, which has good durability and is not easily damaged