Gerda PRO System WKM4 Euro Cylinder 35/35 Brass Class D EN 1303 High Security

Product Overview

The Gerda PRO System (WKM4) 35/35 brass euro profile cylinder provides high-security door locking, meeting the most demanding mechanical and intrusion resistance requirements. Certified according to PN-EN 1303:2015-07 and tested by the Institute of Precision Mechanics in Warsaw, this model is suitable for use in fire-rated and smoke-control doors within residential, commercial, and institutional environments. It operates reliably in a temperature range from -20°C to +80°C, offering robust protection for both new installations and retrofit upgrades.

A key differentiator of the WKM4 is its class D resistance to physical attack, including advanced anti-drilling and anti-bumping features with reinforced internal steel plating and anti-pick mechanisms. This eliminates significant risks for procurement in high-security door projects by meeting the highest security and durability standards required for public sector, commercial, or critical infrastructure applications. Recommended for B2B buyers specifying certified cylinders for fire-rated doors, bulk procurement for new buildings, or replacement in security-upgraded facilities.

Key Features

• Certified to PN-EN 1303:2015-07 ? full compliance with European security and durability standards


• Class D physical attack resistance ? 5-10 minutes of drilling and forced entry defense


• Anti-bumping and anti-pick features ? includes steel anti-drill plates, dual-profile pins, and extra top tumblers


• High code security ? over 2,700,000 key combinations available


• Durability ? rated for over 100,000 operating cycles (mechanism endurance)


• Fire-rated and smoke-control door approved ? compatible with emergency and certified door assemblies


• Operating temperature -20°C to +80°C ? suitable for indoor and outdoor doors in variable climates

Technical Specifications

• Cylinder Type: Euro profile double (35/35)


• Material: Brass


• Key System: 6-pins, dimple key


• Security Rating: Class 6 (highest)


• Intrusion Resistance: Class C (KT/402/IMP/2014), Class D (attack resistance)


• Mechanical Durability: >100,000 cycles


• Key Combinations: >2,700,000


• Temperature Range: -20°C to +80°C


• Certification: PN-EN 1303:2015-07


• Certification: Fire-rated and smoke-control door approved


• Accessories Included: 5 dimple keys, code card, fixing screw

Applications

Typically used in residential, commercial, and public sector facilities that require high-security euro profile cylinders for main entrances, fire-rated, and smoke-control doors. Suitable for both new building projects and door upgrades where certified burglary and fire protection are specified. Commonly selected for bulk procurement in security-sensitive settings such as offices, schools, healthcare, hotels, and critical infrastructure.

Packaging & Shipping

Each unit is supplied in a factory-sealed, tamper-evident box and includes 5 dimple keys, a key code card, a fixing screw, and an installation manual. Packaging is designed to protect against damage and tampering, supporting safe handling during bulk shipments.