Gerda PRO System WKM4 Profile Cylinder 30/45 Brass Class 6 D Anti-Drill Certified

Product Overview

The Gerda PRO System (WKM4) 30/45 brass profile cylinder provides high-security access control for commercial and residential doors equipped with mortise locks. Certified by the Institute of Precision Mechanics in Warsaw, this cylinder meets the PN-EN 1303:2015-07 standard, achieving class 6 D for maximum security, durability, and resistance to mechanical attack. It is approved for use in fire-rated and smoke-control doors, with operational reliability ensured from -20°C to +80°C.

What distinguishes this model is its class D resistance to direct attack, delivering at least 5 to 10 minutes' protection against drilling and mechanical breach. This feature significantly reduces the risk of unauthorized entry in high-value or vulnerable installations, assuring compliance with stringent security and fire regulations. The WKM4 30/45 is suitable for procurement by property managers, security contractors, and facility operators who require certified cylinders for demanding environments and critical infrastructure projects.

Key Features

• Mechanical durability ? over 100,000 operating cycles with 6 tumbler mechanism


• Maximum key code combinations ? more than 2,700,000 unique codes for enhanced security


• Anti-bumping and anti-pick ? two additional top pins plus special design prevent lock manipulation


• Anti-drill protection ? hardened steel plate and anti-drilling pins for class D attack resistance


• Corrosion and temperature resistance ? certified to operate reliably from -20°C to +80°C, class C rating


• Certified for fire and smoke doors ? suitable for use in fire-rated installations per Polish and EU standards


• Comes with 5 dimple keys ? includes security card and fixing screw

Technical Specifications

• Cylinder Length: 30/45 mm


• Material: Brass


• Security Classification: 6 D (PN-EN 1303:2015-07)


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


• Mechanical Durability: over 100,000 cycles


• Temperature Range: -20°C to +80°C


• Key Combinations: >2,700,000


• Certification: Institute of Precision Mechanics, Warsaw


• Fire Door Compatibility: Yes


• Keys Supplied: 5 dimple keys


• Finish: Brass

Applications

Used in apartment blocks, commercial offices, fire and smoke barrier doors, and areas requiring a high-security profile cylinder with certified anti-burglary and anti-drill features. Particularly suitable for property managers, building security upgrades, institutional facilities, and projects with fire safety compliance requirements.

Packaging & Shipping

Each cylinder is factory-sealed in a tamper-evident box and supplied with 5 dimple keys, a security code card, and a fixing screw. Packaging meets high security shipping standards and includes detailed installation instructions.