Gerda PRO System X WKM4 Cylinder Lock Insert 30/30mm Brass Class 6D Attack Resistant

Product Overview

The Gerda PRO System X (WKM4) 30/30 brass cylinder lock insert is an anti-burglary security component designed for use with mortise locks in residential and commercial doors requiring high resistance to break-in attempts. Certified by the Instytut Mechaniki Precyzyjnej in accordance with PN-EN 1303:2015-07, it achieves the highest classifications for security, durability, and resistance to manipulation and environmental factors, making it suitable for fire-rated and smoke-control doors.

What distinguishes this model is its D-class attack resistance, meaning it withstands at least 5-10 minutes of drilling and mechanical assault?substantially reducing the risk of targeted forced entry in critical installations. This level of robustness is particularly valuable for B2B buyers securing multi-unit residential projects, office complexes, or facilities with stringent insurance and fire safety requirements.

Key Features

• Class D attack resistance ? tested to withstand 5?10 minutes of mechanical and drilling attack per IMP KT/402/2014


• Certified to PN-EN 1303:2015-07 ? independent laboratory approval for security, corrosion and temperature resistance, and durability


• Anti-bumping and anti-pick features ? internal pins and upper locking mechanisms counter lock picking and bumping techniques


• Hard steel anti-drill plate ? secures the cylinder core against drill-based forced entry


• 6 pin-tumbler mechanism ? more than 2,700,000 key code combinations for enhanced master key system security


• Durability over 100,000 cycles ? supports intensive use in high-traffic or multi-user environments


• Wide temperature range ? operates from -20°C to +80°C, suitable for exterior or unheated installations

Technical Specifications

• Size: 30/30 mm (total length 60 mm)


• Material: Brass


• Color: Brass


• Classification (PN-EN 1303:2015-07): 1 6 0 B 0 C 6 D


• Certification: Issued by Instytut Mechaniki Precyzyjnej


• Security Class: 6


• Attack Resistance: D (5?10 min drilling/mechanical)


• Master Key Combinations: >2,700,000


• Mechanical Durability: >100,000 cycles


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


• Function: Double-sided cylinder (WKM4 variant)

Applications

Engineered for use in multipoint and mortise locks on residential, commercial, and institutional doors. Suitable for certified fire-rated and smoke-control doors due to its C-class fire resistance and D-class attack resistance. Ideal for high-security installations requiring certified anti-burglary protection, including apartment buildings, office complexes, hotels, and public sector facilities. Compatible with master key systems and recommended for bulk procurement in security-driven construction projects.

Packaging & Shipping

Each unit is factory-sealed in tamper-evident packaging and includes the cylinder, five dimple keys, a code card, mounting screw, and instruction manual. Aesthetic retail box packaging ensures integrity and readiness for direct installation or OEM distribution.