Gerda PRO System WKM4 Euro Cylinder 30/30 Nickel Satin Class 6D Anti-Burglary

Product Overview

The Gerda PRO System (WKM4) 30/30 nickel satin euro profile cylinder provides high-security locking for mortise locks in residential, commercial, and institutional doors. Certified to PN-EN 1303:2015-07 with class 6D for key security, durability, corrosion and attack resistance, it has been independently tested by the Institute of Precision Mechanics in Warsaw. The cylinder is approved for use in fire-rated and smoke-control doors, supporting security requirements under demanding conditions.

What sets the WKM4 cylinder apart is its class D resistance to attack, including 5?10 minutes' drilling resistance, achieved with hardened internal components. This significantly reduces forced-entry risk for facility managers and procurement teams specifying hardware for high-security commercial access points. Particularly recommended for upgrades and tenders in settings with strict anti-burglary and fire safety standards, such as public buildings, offices, and critical infrastructure projects.

Key Features

• Class D anti-burglary ? 5?10 min drilling and mechanical attack resistance per PN-EN 1303:2015-07


• Anti-bumping and anti-picking features ? includes hardened pins and extra upper pins for picking resistance


• Over 2,700,000 key differs ? high-security coding for minimal key duplication risk


• Tested for 100,000+ cycles ? ensures long-term durability and lifecycle cost reduction


• Fire- and smoke-door approved ? certified use with fire-rated assemblies


• Operating temperature range -20°C to +80°C ? suitable for indoor and outdoor installation


• Delivered with 5 dimple keys, code card, and mounting screw ? all necessary accessories included

Technical Specifications

• Product Type: Euro profile double cylinder (WKM4)


• Size: 30/30 mm


• Material/Finish: Nickel satin


• Certification: PN-EN 1303:2015-07, Class 6 D


• Test Institute: Institute of Precision Mechanics (Warsaw)


• Key Security: Class 6; >2,700,000 combinations


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


• Endurance: 100,000 cycles minimum


• Fire Door Approval: Yes


• Corrosion Resistance: Class C


• Temperature Range: -20°C to +80°C


• Includes: 5 dimple keys, code card, fixing screw

Applications

Specified for use in high-security doors in commercial buildings, offices, public sector facilities, and modern residential developments. Compatible with fire-resistant and smoke-control doors per certification, also used in access control upgrades and retrofit security modernization. Suited for bulk procurement and tenders where extended attack resistance and verified durability are project requirements.

Packaging & Shipping

Each cylinder is packed in a sealed, tamper-evident box containing five dimple keys, a code card, a mounting screw, and product documentation. Packaging meets export standards and is suitable for both individual units and bulk orders.