Gerda PRO System X lock cylinder (WKM4Z) 30/45 gear, nickel, class 6 D, box

GERDA Pro System Anti-Burglary Cylinder ? Unmatched Door Security

The GERDA Pro System anti-burglary cylinder is a high-security solution for mortise locks, providing superior protection against intruders. Featuring anti-bumping and anti-drilling protection, this cylinder safeguards your home with unparalleled reliability. The GERDA WKM4 cylinder is tested and certified by the Institute of Precision Mechanics in Warsaw, meeting the PN-EN 1303:2015-07 standard and 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-resistant doors. GERDA Pro System door cylinders are available in satin nickel and brass finishes, and with knob, thumb turn (WKM4), and gear (WKM4Z) options.

• 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


• Exceptional mechanism durability ? 6 pins, over 100,000 cycles


• Over 2,700,000 key code combinations


• Highest security rating ? 6


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


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


• Resistance to attack: Class D ? highest (5/10 min. drill 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 top latches)


• Anti-pick pins to prevent unauthorized opening via bumping


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 high-security keys, coding card, screw, and attractive packaging.

How to choose the right cylinder size?

Watch the video below.

Valued Customers, Please Make Informed Purchases

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

Due to the nature of this product, we cannot accept returns of opened or damaged packaging as we cannot resell these 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 and happy to assist you in selecting the right product.

Thank you for your understanding and we invite you to explore our product range.