Probrico 4 Pack Black Double Cylinder Deadbolt Lock Set - Keyed Both

Our review of the Probrico 4 Pack Black Double Cylinder Deadbolt finds it best suited for homeowners and small commercial operators who need firm access control and a uniform keying solution. The single biggest reason to consider this deadbolt is its double cylinder design, which requires a key on both sides and provides consistent control over entry and exit-ideal where glass near the door or shared interior spaces make thumb-turns unsuitable. The pack of four keyed-alike locks also simplifies management for multi-door installs.

Key Features

• Double Cylinder: Requires a key to unlock from both sides, adding a layer of security where a thumb-turn could be compromised.
• Adjustable Latch: Fits doors 1-3/8 in to 1-3/4 in thick and supports 2-3/8 in or 2-3/4 in backset, so it accommodates most standard door preps.
• Keyed Alike Convenience: All four locks arrive keyed alike, reducing the number of keys needed for multiple doors and simplifying access control.
• Design Compatibility: Available finishes are intended to blend with common decor and standard preps for a near-seamless retrofit.
• DIY Friendly Installation: Includes hardware and clear instructions so a competent homeowner can install the deadbolts without special tools.

Who It's For

The Probrico double cylinder deadbolt is aimed at homeowners, landlords, and small business owners who need controlled access on exterior doors or interior rooms where a thumb-turn is undesirable. Its keyed-alike set is especially useful for properties with several entrances or suites that should share the same key.

It is less appropriate for installations where emergency egress must be immediate without a key or where local codes prohibit double cylinder locks; those requiring single-sided thumb-turn operation should look elsewhere.

Pros & Cons

Pros

• Provides enhanced access control by requiring a key on both sides of the door.
• Adjustable latch and backset fit most standard door thicknesses and preps.
• Keyed-alike 4-pack simplifies key management across multiple doors.
• Designed for straightforward DIY installation with included hardware.

Cons

• Some users report inconsistent installation difficulty and occasional key retention issues where keys can stick and not release smoothly.

Specifications

Our Verdict

The Probrico 4 Pack Black Double Cylinder Deadbolt is a practical value for anyone needing keyed control on multiple doors and standard compatibility with common door preps. It pairs sturdy design and adjustable fitting with the convenience of keyed-alike locks, making it a sensible choice for controlled-access situations, though installers should be mindful of potential key retention reports and local egress requirements.

Frequently Asked Questions

Will these deadbolts fit my standard exterior door?
Yes; the latch is adjustable for doors 1-3/8 in to 1-3/4 in thick and supports 2-3/8 in or 2-3/4 in backset.

Do all four locks use the same key?
Yes; this 4-pack is shipped keyed alike so all locks operate with the same key.

Is installation difficult for a DIYer?
The locks include hardware and instructions for homeowner installation, though some users report mixed experiences and recommend taking time to follow steps carefully.