Black double cylinder deadbolt designed for reliable residential security. This keyedbothsides round door lock provides controlled access for interior and exterior doors and comes as a convenient 3pack with all locks keyed alike. Key benefits Controlled access: Doublecylinder design requires a key to lock and unlock from both sides, giving you consistent access control. Uniform keys: All keyed alike — one key works for all three locks in the pack, reducing the number of keys you need to carry and manage. Versatile use: Designed for residential interior and exterior doors where keyed entry on both sides is preferred. Discreet appearance: Black round design blends with many door styles for a lowprofile, consistent look. Primary features Lock type: Double cylinder deadbolt, keyed on both sides. Finish and style: Black round door lock design. Quantity and keying: Pack of 3 locks, all keyed alike. Intended application: Residential use for interior and exterior doors. Why customers choose this lock Adds deliberate access control where a keyed lock is required on both sides of the door. Simplifies key management with one key for all locks in the set. Ideal when consistent appearance and functionality are needed across multiple doors. Typical use cases Exterior entry doors with sidelights or glass panels where onesided thumbturns are not desirable — using a key on both sides ensures consistent locking behavior. Interior doors such as home offices, storage rooms or rooms requiring controlled access from both sides. Multiple exterior or interior doors in the same residence where matching keyed locks simplify daily use and key management. What's included Three (3) black double cylinder deadbolts, keyed both sides and all keyed alike. Note: This product is specified as a residential security round door lock for interior and exterior use, double cylinder deadbolt, keyed both sides, all keyed alike, and sold as a 3pack.