Gerda PRO System X WKM4 Euro Cylinder 30/35 mm Class 6D Nickel Satin EN 1303 Certified

Product Overview

Gerda PRO System X (WKM4) cylinder insert is an anti-burglary solution for mortise locks in residential and commercial doors, certified to PN-EN 1303:2015-07 and rated at the highest class 6 D. It is tested by the Institute of Precision Mechanics in Warsaw, features advanced protection against bumping, drilling, and picking, and operates in demanding conditions including fire- and smoke-rated doors.

Unlike generic cylinder inserts, the WKM4 model features dual-diameter pins and an internal hardened steel plate, providing enhanced resistance to drilling and mechanical attacks. This effectively minimizes security risks and supports compliance with fire door regulations, making the WKM4 especially suitable for bulk procurement in security-sensitive commercial properties and fire-rated installations.

Key Features

• Certified PN-EN 1303:2015-07 ? meets European cylinder security and durability standard


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


• Anti-bumping and anti-picking ? internal pins and additional upper latches reduce lock manipulation


• 2700000 key code combinations ? ensures high key uniqueness for large-scale deployments


• Operating temperature -20°C to +80°C ? maintains function in extreme environments


• Tested durability ? 100000+ cycles and 6 tumbler mechanism provide lasting reliability


• Fire and smoke door approved ? eligible for use in fire-rated installations

Technical Specifications

• Size: 30/35 mm (length)


• Material: Nickel satin finish


• Cylinder Type: WKM4 (dual-diameter pins, hardened plate)


• Number of Tumblers: 6


• Key Code Combinations: 2,700,000+


• Tested Durability: 100,000 cycles


• Resistance Class: 6 D (highest)


• Certification: PN-EN 1303:2015-07


• Attack Resistance: Class D (up to 10 min mechanical/drilling)


• Corrosion/Temperature Resistance: Class C (-20°C to +80°C)


• Fire Door Suitability: Approved


• Included Keys: 5 drilled keys


• Package: Boxed with code card and mounting screw

Applications

Designed for installation in residential, commercial, and institutional doors requiring enhanced security and compliance with fire and smoke door regulations. Commonly used for fire-rated doors, high-security office entrances, residential apartment blocks, and OEM projects demanding certified anti-burglary hardware.

Packaging & Shipping

Each unit is sealed in a tamper-evident box with five drilled keys, code card, mounting screw, and clear identification labeling. Bulk orders may be palletized. Packaging complies with security and certification requirements to prevent unauthorized access.