In architectural ironmongery, a 64mm euro profile double cylinder is almost universally manufactured as a 32/32 symmetric split. This means the distance from the center fixing screw to either end of the barrel is exactly 32mm.
Why the 64mm Specification is the Modern Standard
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uPVC & Composite Compatibility: Most modern uPVC and 44mm composite doors utilize a multi-point locking system. When you factor in the thickness of the door leaf plus the depth of the handle backplates (typically 10mm–12mm per side), a 64mm cylinder provides a perfect, flush-to-handle fit.
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Deadlocking Security: Unlike thumbturn cylinders, the double-key configuration ensures that the door cannot be opened from the inside without a key. This is often a mandatory requirement for insurance compliance on final exit doors.
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Master Key Integration: The 64mm barrel is the most common size used in Master Key Systems for office blocks and apartment complexes. Its internal dimensions allow for complex pin configurations while maintaining a compact physical footprint.
Advanced Security Architecture
A professional-grade 64mm euro profile double cylinder is engineered to resist the “Big Four” methods of forced entry:
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Anti-Pick Technology: Utilizes specialized “mushroom” or “spool” driver pins. These pins have a unique shape that makes it nearly impossible for a lock-picker to feel the true shear line, significantly increasing the time required to bypass the lock.
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Anti-Drill Protection: Integrated hardened steel pins or ceramic plates are positioned in the front of the cylinder body. These are designed to shatter or deflect high-speed drill bits before they can reach the internal pin stacks.
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Anti-Bump Resistance: High-tension springs and mass-variable pins prevent “lock bumping”—a kinetic energy technique used to jump the pins into the open position.
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Anti-Snap Sacrificial Lines: Many high-security 64mm cylinders feature a “sacrificial” cut. If the lock is attacked with force, the end snaps off but leaves the central cam and the rest of the barrel securely locked within the door.
Technical Specifications of 64mm euro profile double cylinder
| Feature | Detailed Specification |
| Total Length | 64mm |
| Cylinder Type | Double (Key/Key Operation) |
| Split Configuration | 32mm / 32mm (Symmetric) |
| Security Standards | BS EN 1303 Grade 6 (Highest Security) |
| Pin Configuration | 6-Pin or 10-Pin High Precision |
| Material | Solid Brass (Available in Satin Nickel, Chrome, or Brass) |
Recommended 64mm Security Solutions
For residential security, the Yale 64mm Anti-Snap Cylinder is an industry leader. It features a patented anti-snap design and a 6-pin core that provides excellent resistance to the most common methods of burglary.
If you are outfitting a commercial space or a high-end residential project, the 64mm euro profile double cylinder offers a professional 10-pin system. Its restricted keyway ensures that keys cannot be duplicated at a standard hardware store without a security code card, giving you total control over access.
Installation Pro-Tip: The “Flush” Rule
For maximum security, a 64mm euro profile double cylinder should sit flush or protrude no more than 3mm from the face of the handle or escutcheon. If your 64mm cylinder sticks out more than 5mm, it becomes an easy target for “lock snapping” tools. If you find your current door leaves the lock exposed, you may need to check if a 60mm (30/30) variant would offer a safer, more recessed fit.
Enhance your door security with the 64mm euro profile double cylinder , designed for smooth operation, strength, and long-lasting durability. Each cylinder operates with its own unique key, providing independent access for residential, commercial, and multi-unit properties. The 64mm Euro profile ensures a secure and precise fit for standard doors, offering a robust and practical locking solution.
Crafted from premium-quality materials, the 64mm euro profile double cylinder is built to resist tampering, forced entry, and daily wear, delivering reliable performance over time. Its keyed-to-differ feature allows each cylinder to function independently, making it perfect for offices, apartments, and multi-door installations. Easy to install and designed for everyday use, this 64mm euro profile double cylinder lock combines strength, convenience, and peace of mind.


























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