GERDA PRO System 35/50 insert with knob, satin nickel, class 6 D, blister

GERDA Pro System Anti-Snap Cylinder ? Unparalleled Door Security

The GERDA Pro System anti-snap cylinder is a superior door lock insert providing robust security. This anti-bumping and anti-drilling cylinder effectively protects your home from intruders. The GERDA WKM4 cylinder has been rigorously tested 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-proof doors. GERDA Pro System door cylinders are available in satin nickel and brass finishes, and in versions with a knob, thumbturn (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


• Exceptional 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


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


• Resistance to attack: 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 techniques


• Additional anti-snap bar


• New double-diameter pins


• Includes 5 high-security keys, a code card, 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 security standards. Therefore, all our certified cylinders are packaged in sealed boxes guaranteeing their pristine condition and full functionality.

Due to the product's nature, please note that we cannot accept returns of opened or damaged packages, as we cannot re-introduce such products into our sales cycle.

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 range.