Gerda PRO System X WKM4 Double Cylinder 40/40 EN 1303 Class 6 D Nickel Satin

Product Overview

The Gerda PRO System X (WKM4) 40/40 nickel satin is a high-security double cylinder profile cylinder, engineered to secure mortise locks in exterior and interior doors. Designed for commercial, residential, and institutional facilities requiring consistent, high-level mechanical protection, it meets PN-EN 1303:2015-07 standards and is certified by the Polish Institute of Precision Mechanics. Its robust construction ensures suitability for use in fire-rated and smoke-control doors, including high-traffic or critical access areas.

The feature that distinguishes this model is its maximum security classification: 1 6 0 B 0 C 6 D under EN 1303, with attack resistance class D (drilling resistance up to 10 minutes), providing procurement assurance where certified high resistance to burglary and manipulation is required. This makes the cylinder particularly suitable for facility managers, OEM door producers, and security contractors specifying hardware for multi-unit buildings, critical infrastructure doors, and areas with elevated anti-intrusion requirements.

Key Features

• Double-sided cylinder 40/40 mm ? suited for symmetrical Euro profile lock installations


• Certified to PN-EN 1303:2015-07 ? ensures compliance with European door hardware standards


• Attack resistance class D ? withstands mechanical and drilling attacks for up to 10 minutes


• Over 2,700,000 key code variations ? reduces risk of unauthorized duplicate keys in large facilities


• Anti-bumping and anti-pick protection ? upper security pins and drill-resistant steel bar protect against manipulation


• Temperature and corrosion resistance class C ? operational from -20°C to +80°C, suitable for harsh environments


• Tested durability ? mechanism rated for over 100,000 operating cycles

Technical Specifications

• Cylinder Length: 40/40 mm


• Material/Finish: Nickel satin


• Security Classification: 1 6 0 B 0 C 6 D (EN 1303)


• Attack Resistance Class: D


• Number of Pins: 6


• Key Combinations: 2,700,000+


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


• Maximum Cycles: 100,000+


• Fire Door Suitability: Yes


• Certification: PN-EN 1303:2015-07 by IMP


• Included Keys: 5 drilled keys

Applications

Used in fire-rated and smoke-control doors for residential, commercial, and institutional buildings, including apartment blocks, offices, schools, and critical infrastructure. Suitable for doors requiring maximum burglary and manipulation resistance. Recommended for large-scale facility management, OEM hardware integration, and security upgrades in high-risk environments.

Packaging & Shipping

Each cylinder is factory-sealed in a tamper-evident box and includes 5 drilled keys, a key code card, and mounting screw. Aesthetic retail packaging is provided; bulk and special shipment options available for contract orders.