Gerda PRO System (WKM4) 30/30 satin nickel cylinder, class 6 D, box

GERDA Pro System Anti-Burglary Cylinder ? Unparalleled Door Security

The GERDA Pro System anti-burglary cylinder is a high-security solution for mortise locks, providing exceptional protection against intruders. This anti-bumping and anti-drilling cylinder safeguards your home with superior defense. The GERDA WKM4 cylinder, tested by the Institute of Precision Mechanics in Warsaw according to PN-EN 1303:2015-07, achieved a remarkable classification: 1 6 0 B 0 C 6 D. The GERDA Pro System cylinder is approved for use in fire and smoke-resistant doors. GERDA Pro System door cylinders are available in satin nickel and brass finishes, and with a knob, thumb turn (WKM4), or gear (WKM4Z).

• Cylinder classification according to PN-EN 1303: 2015-07: 1 6 0 B 0 C 6 D


• Certificate issued by the Institute of Precision Mechanics


• Unmatched mechanism durability ? 6 pins, exceeding 100,000 cycles


• Over 2,700,000 key code combinations


• Highest security class ? 6


• Highest burglary resistance ? Class C (high) according to KT/402/IMP/2014


• Superior corrosion and temperature resistance -20/+80 degrees Celsius ? Class C (highest)


• Attack resistance: Class D ? highest (5/10 min. drilling resistance, resistance to mechanical attack)


• Recommended for fire-rated doors


• Anti-drilling protection (inner cylinder protected by a hardened steel plate)


• Anti-picking protection (two additional upper latches)


• Anti-picking pins to prevent unauthorized opening via bumping


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 high-security keys, a code card, a screw, and elegant packaging.

How to choose the right cylinder size?

Watch the video below.

Valued Customers, Please Choose Carefully

We are committed to your satisfaction and the highest safety standards. Therefore, all our certified cylinder locks are packaged in sealed boxes to guarantee their integrity and full functionality.

Due to the nature of this product, we cannot accept returns of opened or damaged packaging, as we cannot re-sell such items.

Please carefully review the technical specifications and precisely measure your door dimensions before purchasing. If you have any questions or concerns, our team is ready to assist you in selecting the right product.

Thank you for your understanding. We invite you to explore our range of products.