PRIME-LINE Door Knob Lock-Out Device, Keyed Alike, Diecast, Gray (1 Set)

Price: $13.76
(as of Oct 01, 2026 03:00:11 UTC – Details)


Prevent unauthorized access to keyed entry doors with this Defender Security Doorknob Lock-Out Device. Designed to fit over round entry doorknobs, this security device blocks access to the keyhole, preventing other keyholders from unlocking the door. Constructed from durable diecast metal, the lock-out device features a removable cylinder retained by an O-ring for convenient cleaning when unlocked and open. The cylinder cannot be removed while the device is locked, helping maintain security. Ideal for rental properties, evictions, home sales, job sites, offices, storage rooms, and other controlled-access applications, this lock-out device provides a faster and more cost-effective alternative to replacing an entire lockset. Fits round doorknobs up to 2-7/16 in. in diameter with a 1-3/16 in. shaft opening. Be sure to measure your doorknob before ordering for proper fit.
Ideal Use: Blocks access to the keyhole on keyed entry doorknobs for rentals, home sales, evictions, job sites, offices, and storage rooms
Dimensions & Compatibility: Fits round doorknobs up to 2-7/16 in. in diameter with a 1-3/16 in. circular shaft opening
Materials & Components: Durable diecast metal construction with removable cylinder secured by an O-ring for cleaning when unlocked
Key Features: Covers the keyhole to prevent access by other keyholders without replacing the existing lock and knob assembly
Fit Guidance: Measure the outside diameter of the doorknob before ordering to ensure proper fit; keys may be located inside the device upon arrival.
Customers find the door lock-out device to be a quality product that’s easy to put on and remove, with good security features that keep intruders away and customers safe. The functionality receives positive feedback as a lifesaver, and while some find it worth the price, others consider it a waste of money. The locking mechanism and weight receive mixed reviews, with some reporting that the mechanism falls out of the hole and finding it really heavy, while others appreciate its weight for its size. The key accessibility is also mixed, with customers noting that all locks use the same key.