Gerda PRO System WKM4 Cylinder Insert 35/45 Brass Class 6 D PN-EN 1303:2015-07

Product Overview

The Gerda PRO System Cylinder Insert (WKM4) 35/45 brass provides high anti-burglary security for mortise lock-equipped doors in residential and commercial buildings. Certified by the Precision Mechanics Institute in Warsaw and tested to PN-EN 1303:2015-07 with the highest 6 D classification, it is approved for use in fire-resistant and smoke-tight doors, offering corrosion and temperature resistance from -20°C to +80°C.

What sets the WKM4 apart is its class D resistance to drilling and mechanical attack, providing up to 10 minutes defense against forced entry?exceeding typical market standards. This capability significantly reduces the risk of unauthorized access and helps buyers ensure regulatory and insurance compliance for high-security openings. The WKM4 is especially recommended for bulk procurement in projects requiring certified burglary resistance, such as multi-dwelling developments, facilities management, and fire-rated door installations.

Key Features

• Class 6 D security rating ? independently tested to PN-EN 1303:2015-07 for the highest anti-burglary performance


• Anti-bumping and anti-drill protection ? hardened steel plate and pins defend against advanced intrusion methods


• Fire-resistant and smoke-tight door approval ? suitable for doors requiring certification


• Over 2,700,000 key code combinations ? minimizes risk of unauthorized key duplication


• Operating temperature -20°C to +80°C ? reliable performance in challenging environments


• 6-tumbler mechanism ? rated for over 100,000 operating cycles for high durability


• Includes 5 dimple keys and code card ? ensures secure key management and future duplication control

Technical Specifications

• Cylinder Size: 35/45 mm


• Material: Brass


• Color: Brass finish


• Security Class: 6 D (PN-EN 1303:2015-07)


• Certification: Precision Mechanics Institute, Warsaw


• Key Combinations: >2,700,000


• Operating Temperature: -20°C to +80°C


• Endurance: >100,000 cycles


• Accessories: 5 dimple keys, code card, mounting screw


• Application: Fire and smoke-tight doors

Applications

Used in entrance, apartment, and technical doors in residential and commercial buildings. Compatible with fire-resistant and smoke-control doors as required by building regulations. Suitable for multi-family housing, facilities management, and project scenarios needing certified, high-security, and high-durability locking cylinders.

Packaging & Shipping

Supplied in a factory-sealed, tamper-evident box including the cylinder, 5 dimple keys, code card, mounting screw, and instruction manual. Designed to ensure unbroken chain-of-custody and product integrity for security-sensitive installations.