Durable stainless steel door knob lock that covers and locks around the knob to prevent turning and to lock out access to the knob and keyhole. Key benefits - Enhances security by restricting knob rotation and access to the keyhole. - Versatile compatibility with a range of standard knobs and valves. - Simple, tool-free installation with portable, travel-friendly design. - Helps prevent wandering for at-risk individuals and improves child safety. What it fits and how it works - Compatibility: Fits most standard round, tulip, and oval door knobs. Not suitable for lever door handles. Also suitable for faucet or tank valves with a handwheel. - Material and build: Made of stainless steel for durability and reliable locking. - Functionality: Can be used on the exterior or interior side of the knob to provide security as needed. Use scenarios - When leaving the premises: lock the knob to add security before you go. - At home or in a hotel while sleeping: lock the exterior knob to enhance security. - Dementia or wandering risk: helps prevent someone from leaving the home. - Child safety: prevents children from operating the door knob or handwheel and reduces mis-operation. Easy to install, carry and store - Quick installation: just place the device over the knob, lock, and you’re protected. - Handy size for convenient use and storage. - Included pouch: store the device when not in use and hang it on a door handle or door stopper for easy access.