Medeco M3 Double Cylinder High Security Deadbolt

For doors with glass nearby, where a thumbturn could be reached by breaking the glass. The Medeco M3 double cylinder high security deadbolt needs a key on both sides, uses Medeco's patented pick, bump and drill resistant cylinders, and keys that only an authorized Medeco dealer can cut with your key ID card. Choose a residential or commercial (Grade 1) style.

Why choose the Medeco M3 double cylinder

• Key on both sides: no thumbturn to reach through a broken window or sidelight.
• Pick, bump and drill resistant: UL 437 listed cylinders with hardened steel inserts.
• Key control: patented restricted keys that hardware stores cannot copy.
• Residential or commercial: commercial style is ANSI/BHMA Grade 1.

Safety note: a double cylinder lock needs a key to exit. Keep a key near the door when someone is home, and check your local fire code for bedrooms and rentals.

How to order (keying)

• First lock ($395): comes pinned with 2 keys and your Medeco key ID card.
• Additional lock, keyed alike to this order ($365): all your locks open with the same key.
• Additional lock, keyed alike to my existing Medeco key ($365): text a photo of your key ID card to (818) 723-6800 after ordering.

Mixing single and double cylinder Medeco locks on one key? Order the first lock pinned and the rest as "keyed alike to this order." Need more keys? Add Medeco Extra Key. Want it installed? Add Deadbolt Installation.

Choose your backset

Backset is the distance from the edge of the door to the center of the lock hole: 2-3/8" (most homes) or 2-3/4". See our How to measure your door guide with a sketch, or call us.

Professional Medeco installation in Los Angeles

Barak Lock & Security, a licensed locksmith since 2004 (CA BSIS LCO4897, CSLB 995953), installs Medeco across the Los Angeles area, Ventura County and the San Fernando Valley. Call (818) 723-6800.