Gerda PRO System cylinder (WKM4) 30/45 brass, class 6 D, box

GERDA Pro System Anti-Burglary Cylinder ? Unparalleled Door Security

The GERDA Pro System anti-burglary cylinder is a superior door lock security solution. This anti-bumping and anti-drilling cylinder provides exceptional protection against intruders, safeguarding your home. The GERDA WKM4 cylinder has been tested by the Institute of Precision Mechanics in Warsaw in accordance with the PN-EN 1303:2015-07 standard, achieving a classification of: 1 6 0 B 0 C 6 D. The GERDA Pro System cylinder is approved for use in fire and smoke-proof doors. GERDA Pro System door cylinders are available in: satin nickel, brass finishes, and versions with a knob, thumb turn (WKM4), and a gear (WKM4Z).

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


• Certificate issued by the Institute of Precision Mechanics


• Unmatched mechanism durability ? 6 pins, over 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


• Highest 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 doors


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


• Anti-picking protection (two additional upper latches)


• Anti-bumping pins to prevent unwanted opening via bumping methods


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 drilled keys, a code card, screw, and attractive 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, guaranteeing their integrity and full functionality.

Due to the product's nature, we cannot accept returns of opened or damaged packaging, as we cannot resell 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 available to assist you in choosing the right product.

Thank you for your understanding. We invite you to explore our offerings.