Mul-T-Lock Mortise Cylinder

The Mul-T-Lock mortise cylinder threads directly into mortise lock bodies -- the most common lock type in NYC apartment buildings, co-ops, condos, and commercial offices. It replaces the standard cylinder to deliver high-security key control, pick resistance, and master key capability while retaining the existing mortise lock hardware.

Common Applications

• NYC apartment building entry doors
• Co-op and condo unit doors
• Commercial office suite doors
• Building lobby and common-area doors
• Stairwell and fire door access points
• Storage room and utility closet locks

Key Features

• Standard 1-1/8 inch threaded mortise body
• Available in extended lengths for thick doors
• Multiple cam configurations for different lock bodies
• Adams Rite, Sargent, Corbin, and Yale compatible
• Anti-pick, anti-drill, and anti-bump protection
• Restricted keyway prevents unauthorized duplication
• Master key, grand master, and construction key compatible
• Available in brass, chrome, and dark bronze finishes

Mortise cylinders are by far the most common cylinder type in NYC residential buildings. Most pre-war and mid-century apartment buildings use mortise locks on every unit door. Upgrading to Mul-T-Lock mortise cylinders gives building management strict key control -- no tenant can have copies made at a corner hardware store, and master key hierarchies keep maintenance access organized.