Gerda PRO System WKM4 Euro Cylinder Lock 30/50mm Brass Class 6D Anti-Drilling

Product Overview

The Gerda PRO System (WKM4) 30/50 brass cylinder is a high-security euro profile lock insert, engineered for use with mortise locks in demanding environments such as residential and commercial buildings. It is certified by the Instytut Mechaniki Precyzyjnej and classified according to PN-EN 1303:2015-07, achieving the highest security and durability ratings (1 6 0 B 0 C 6 D), including class 6 protection and fire/smoke door approval.

A key distinction of the WKM4 is its class D anti-drilling and anti-mechanical attack resistance, validated for 5/10 minutes under mechanical assault testing. This feature greatly minimizes security breach risks for facility managers and property owners requiring enhanced burglary protection. The product is recommended for B2B procurement targeting fire-rated, smoke-control, and high-security door installations, especially in public, commercial, or multifamily residential projects.

Key Features

• Class D anti-drilling resistance ? withstands mechanical attacks for up to 10 minutes, meeting highest IMP standard


• Anti-bumping and anti-picking ? additional top pins and hardened steel inserts block unauthorized opening methods


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


• High durability ? 6-pin mechanism rated for over 100,000 operating cycles


• Corrosion and temperature resistance ? operates reliably from -20°C to +80°C with class C certification


• Over 2,700,000 key code combinations ? supports complex master key systems and anti-duplication security


• Included security accessories ? 5 dimple keys, coded card, fixing screw and tamper-evident packaging

Technical Specifications

• Cylinder Length: 30/50 mm


• Material: Brass


• Pin Mechanism: 6-pin


• Key Combinations: 2,700,000+


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


• Certification: PN-EN 1303:2015-07


• Security Classification: 1 6 0 B 0 C 6 D


• Fire/Smoke Door Approval: Yes


• Corrosion Resistance: Class C


• Anti-drilling Resistance: Class D


• Accessories Included: 5 keys, code card, mounting screw

Applications

Widely used in high-security residential and commercial settings, including apartment blocks, offices, and public buildings. Compatible with fire-rated and smoke-control doors, and suitable for bulk procurement in new construction or replacement projects demanding certified lock hardware. Often chosen for facility management, OEM door manufacturers, and security-conscious retrofits.

Packaging & Shipping

Each cylinder shipped in tamper-evident, sealed box including 5 dimple keys, unique code card, fixing screw, and user instructions. Standard export packaging ensures product integrity for B2B delivery. Bulk orders are available with enhanced protective shipment.