Defender Security EP 4180 Doorknob Lock-Out Device – Doorknob Lock w/ Key to Block Access to Keyhole, Removeable & Easy to Use, Fits Round Doorknobs with Max Diameter of 2-7/8”, Gray (Single Pack)

• DOORKNOB LOCK-OUT DEVICE – The Defender Security doorknob lock-out device can be placed directly over the doorknob to prevent access to the keyhole.
• COVERS KEYHOLE – This doorknob security device is designed to keep the keyhole on the knob from being accessed, not the handle from being turned, effectively keeping other keyholders out.
• REMOVABLE – The durable diecast cylinder is held in place with an O-ring and is removable when the device is unlocked and open. The cylinder cannot be removed when the device is closed and locked.
• DIMENSIONS – This lock-out device can protect round doorknobs that have a max diameter of 2-7/16”. Note that the shaft cut-out is round in shape and measures 1-3/16 inch, so it may fit loosely over doorknobs with round, slender shafts.
• APPLICATIONS – This lock-out device is often used in evictions, rentals, home sales, on job sites, in-home, in-office storage knobs and more. It can be used in any situation where you want to prevent others with keys from unlocking the doorknob.
• NOTE - The keys may be inside the lock-out device during transportation

Source reference: https://www.amazon.com/dp/B013P3H6L4