Gerda PRO System X 30/40 cylinder insert, satin nickel, class 6 D, box

GERDA Pro System Anti-Burglary Cylinder ? Unmatched Door Protection

The GERDA Pro System anti-burglary cylinder is a high-security lock insert designed for mortise locks, offering superior protection against intruders. This anti-bumping and anti-drilling cylinder safeguards your home with exceptional reliability. The GERDA WKM4 cylinder has been tested by the Institute of Precision Mechanics in Warsaw according to 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-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


• Certified 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


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


• Attack resistance: Class D ? highest (5/10 min. drilling resistance, high 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 preventing unauthorized opening via bumping techniques


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 high-security 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 pristine condition 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 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. Explore our range of products.