Mul-T-Lock Rim Cylinder

The Mul-T-Lock rim cylinder is a surface-mounted cylinder designed for vertical deadbolt locks and night latches -- the ubiquitous secondary lock found on virtually every apartment door in New York City. It provides high-security key control for rim-mounted locks like Segal, Fox Police Lock, and other vertical deadbolt brands common throughout NYC buildings.

Common Applications

• NYC apartment vertical deadbolt locks
• Segal and Fox rim lock upgrades
• Night latch and auxiliary locks
• Gate and garden-level entry locks
• Basement and utility room rim locks
• Building superintendent access doors

Key Features

• Standard rim cylinder mounting (fits Segal, Fox, and others)
• Tailpiece included for common rim lock bodies
• Anti-pick and anti-bump pin technology
• Patented restricted keyway
• Compatible with master key systems
• Multiple tailpiece options for different lock brands
• Hardened steel anti-drill protection

In New York City, the rim lock with vertical deadbolt is the single most common lock type on apartment doors. Most units have both a mortise lock and a rim lock. Upgrading both to Mul-T-Lock cylinders ensures every lock on the door uses the same restricted key, simplifying key management while maximizing security against picking, bumping, and unauthorized copies.