DIERRE ATRA 427 Mortise Lock 4-Bolt Universal Cylinder Anti-Tamper Lock Trap

Product Overview

The DIERRE ATRA 427 mortise lock is engineered for inward-opening Dierre doors and operates with a single-system cylinder mechanism. Utilized in residential and commercial security door installations, it features four robust locking bolts for enhanced protection and stability. Its universal design allows compatibility with both right and left door panels, offering flexibility for procurement and installation in mixed-door environments.

Lock Trap anti-tamper technology is the defining feature of this model, automatically securing the lock if the cylinder is removed. This eliminates a common security vulnerability and ensures compliance with advanced safety requirements in projects demanding high anti-burglary standards. The ATRA 427 is ideal for bulk procurement in residential apartment complexes, commercial entrance doors, and OEM security door manufacturing.

Key Features

• Four massive locking bolts ? provides increased door stabilization and security barrier against forced entry


• Universal orientation ? fits both right and left-hand door leaves, simplifying inventory management


• Single-system cylinder operation ? compatible with standard bębenkowa cylinder inserts for ease of maintenance


• Lock Trap anti-tamper mechanism ? locks automatically when the cylinder is removed, deterring manipulation and burglary attempts


• Mortise type ? designed for integration into door leaf, suitable for professional security installations


• Designed for inward-opening doors ? matches typical residential and commercial security doors


• Heavy-duty construction ? suitable for high-traffic and demanding environments

Technical Specifications

• Lock Type: Mortise


• Bolt Count: 4


• System: Single-system, cylinder-operated


• Door Compatibility: Right and Left


• Compatible Door Brand: Dierre


• Opening Direction: Inward

Applications

Used in residential apartment entry doors, commercial storefronts, and professional security doors requiring enhanced protection and stable closure. Suitable for OEM integration and bulk installation projects demanding universal lock orientation and anti-tampering features.

Packaging & Shipping

Standard export packaging. Unit includes lock body and mounting hardware. Installation instructions provided with each item.