Mul-T-Lock Jimmy-Proof Rim Lock

The Mul-T-Lock Jimmy-Proof Rim Lock is a surface-mounted interlocking deadbolt designed to resist the most common NYC apartment break-in method: jimmying and prying. Its interlocking bolt mechanism engages directly into a strike mounted on the door frame, creating a physical interlock that cannot be spread apart -- making it far more resistant to forced entry than standard vertical deadbolts.

Common Applications

• NYC apartment doors (primary or secondary lock)
• Co-op and condo unit entry doors
• Studio and one-bedroom apartments
• Ground-floor and garden-level apartments
• Doors requiring pry-resistant security
• Tenant security upgrades without frame modification

Key Features

• Interlocking vertical deadbolt mechanism
• Resists jimmying, prying, and frame-spreading attacks
• Surface-mounted (no mortise pocket required)
• Mul-T-Lock high-security rim cylinder included
• Heavy-gauge steel construction
• Through-bolt mounting for maximum strength
• Compatible with standard NYC apartment doors
• Available in multiple finishes

The Jimmy-Proof rim lock directly addresses how NYC apartment break-ins happen: spreading the door frame to bypass the deadbolt. The interlocking bolt design means the lock and strike physically interlock, distributing force across the connection and preventing the gap-spreading technique. For NYC tenants looking for the strongest possible surface-mounted lock, the Jimmy-Proof with Mul-T-Lock cylinder is the top choice.