Gerda PRO System WKM4 Cylinder Lock 35g/30 Brass Knob Class 6D Anti-Drilling Certified

Product Overview

The Gerda PRO System (WKM4) 35g/30 brass cylinder lock features a knob and is certified to the highest security standards for anti-burglary protection. Intended for professional installation in residential and commercial doors, it meets PN-EN 1303:2015-07 requirements and holds certification from the Institute of Precision Mechanics in Warsaw, including classification 1 6 0 B 0 C 6 D. Suitable for fire-rated and smoke-control doors up to the highest mechanical durability class.

The defining feature of this SKU is its top-tier resistance to drilling and mechanical attack, classified as class D (withstand drilling for 5/10 minutes), which minimizes security risks in high-value or vulnerable properties. This advanced break-in protection is especially relevant for bulk procurement by property managers, insurance-sensitive commercial facilities, and OEM fire-door manufacturers seeking maximum certified security with fully documented test results.

Key Features

• Highest security class 6 ? certified per PN-EN 1303:2015-07 for anti-burglary use


• Anti-drilling protection ? internal cylinder secured with hardened steel plate, class D (5/10 min resistance)


• Fire-door and smoke-control approval ? allowed for installation in fire-rated doors


• Over 2,700,000 key code combinations ? reduces risk of unauthorized duplication


• Anti-bumping and anti-picking ? includes upper pins and needle protection against lock picking and bumping


• Mechanical durability over 100,000 cycles ? ensures sustained performance for commercial use


• Operating temperature -20°C to +80°C ? suitable for harsh environments and external doors

Technical Specifications

• Cylinder Length: 35 mm (outside) / 30 mm (inside)


• Material: Brass


• Finish: Brass


• Knob: Included


• Classification: 1 6 0 B 0 C 6 D (PN-EN 1303:2015-07)


• Certification: Institute of Precision Mechanics, Warsaw


• Security Class: 6 (highest)


• Resistance to Burglary: Class C (highest)


• Resistance to Drilling: Class D (5/10 min)


• Key Combinations: Over 2,700,000


• Pins: 6 (double diameter)


• Cycles: Over 100,000


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


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

Applications

Commonly used in residential and commercial doors requiring certified anti-burglary, fire, and smoke protection, including apartments, offices, hotels, and institutional buildings. Ideal for fire-rated and smoke-control doors, insurance-sensitive installations, and OEM projects where PN-EN 1303:2015-07, fire approval, and high durability are stipulated in project requirements.

Packaging & Shipping

Secure, sealed box packaging includes the cylinder lock, 5 drilled keys, code card, mounting screw, and installation manual. Boxes are factory-plombed to guarantee integrity; bulk shipment options available for OEM and commercial orders.