The 3* British Standard Kitemarked Invincible Thumbturn cylinder with 5 times the strength than conventional cylinders, offers maximum protection against attack; providing an effective and secure solution to the threat of bumping, lock picking & drilling.
The Kitemark™ logo stamped on the face of the cylinder provides assurance that the 3* Invincible Cylinder meets the BSI requirements and also acts as a visual deterrent to potential intruders due to the unique shaped of the cylinder.
The Invincible Thumbturn cylinders are manufactured from solid brass and are available in both a both brass and satin finishes. Supplied with 3 cut keys, the double cylinders allows for controlled access from both sides of the cylinder.
All 3* Invincible double cylinders are anti drill, anti pick and anti-bump resistant. All finishes meet the requirements of BS EN 1670:2007 Grade 3 (96 hours) for Corrosion Resistance to provide the most robust finish for your hardware and to ensure smooth and consistent performance over time the lock is endurance tested in our test house to 100,000 cycles.
