Gerda PRO System (WKM4) 30g/35mm cylinder with knob, brass, class 6 D, box

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

The GERDA Pro System Anti-Burglary Cylinder is a high-security door lock that works with mortise locks. This anti-burglary cylinder, with anti-bumping and anti-drilling protection, provides exceptional home security against intruders. 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. This 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


• 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


• 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 unauthorized opening via bumping techniques


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 high-security keys, a key code card, a screw, and elegant 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. 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 products.

Please carefully check the technical specifications and precisely measure your door before purchasing. If you have any questions or concerns, our team is available and happy to assist you in choosing the right product.

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

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

The GERDA Pro System Anti-Burglary Cylinder is a high-security door lock that works with mortise locks. This anti-burglary cylinder, with anti-bumping and anti-drilling protection, provides exceptional home security against intruders. 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. This 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


• 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


• 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 unauthorized opening via bumping techniques


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 high-security keys, a key code card, a screw, and elegant 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. 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 products.

Please carefully check the technical specifications and precisely measure your door before purchasing. If you have any questions or concerns, our team is available and happy to assist you in choosing the right product.

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