GERDA PRO System 30/50 insert, satin nickel, class 6 D, blister

GERDA Pro System Anti-Snap Cylinder ? Superior Door Security for Every Home

The GERDA Pro System anti-snap cylinder is a high-security lock designed for mortise door 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 rigorously tested by the Institute of Precision Mechanics in Warsaw, complying 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-rated and smoke-proof doors. GERDA Pro System door cylinders are available in: satin nickel and brass finishes, and in 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


• 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)


• 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 upper latches)


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


• 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 safety standards. Therefore, all our certified cylinders are packaged in sealed boxes, guaranteeing their undamaged condition and full functionality.

Due to the nature of the product, we cannot accept returns of opened or damaged packaging, as we cannot re-introduce such products back into sale.

Please carefully review the technical specifications and precisely measure your door 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 and we invite you to explore our range.