GERDA PRO System 30/45 insert with knob, satin nickel, class 6 D, blister

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

The GERDA Pro System anti-burglary cylinder is a high-security lock insert designed for mortise locks, providing unparalleled protection against intruders. Featuring anti-bumping and anti-drilling technology, this exceptional cylinder safeguards your home. The GERDA WKM4 cylinder has been rigorously tested by the Institute of Precision Mechanics in Warsaw, according to the PN-EN 1303:2015-07 standard, achieving a remarkable classification: 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 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


• 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. 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-drilling pins to prevent unauthorized opening via bumping


• Additional anti-burglary bar


• New double-diameter pins


• Includes 5 drilled keys, a 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 security standards. Therefore, all our certified cylinder locks are packaged in sealed boxes, guaranteeing their pristine condition and full functionality.

Due to the nature of this product, we cannot accept returns of opened or damaged packages, as we cannot re-introduce such products back into our inventory.

Please carefully review the technical specifications and precisely measure your door dimensions before purchasing. If you have any questions or concerns, our team is readily 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.