★Made of high-quality steel, this locking device is painted and can be easily installed above the door handle to prevent access to the keyhole, effectively preventing unauthorized key entry. The locking mechanism is held in place by an O-ring and is removable when the device is unlocked and opened, the ideal solution to keep others out, even if they have a door key. ★This is a quicker and simpler solution than replacing the entire knob and lock system on the door, while still getting the protection you need. The machine's fixable round knobs have a maximum outer diameter of 3.5" and come with a combination lock so you don't have to worry about finding your keys. ★Perfect as a faucet lock to lock your outdoor faucets, garden hoses and prevent water theft, guard wallet.