A 80mm Euro Profile Double Cylinder is a high-capacity security lock barrel designed for extra-thick doors, such as high-performance composite doors, triple-glazed uPVC units, or insulated timber fire doors. With a total length of 80mm, this 80mm Euro Profile Double Cylinder provides the necessary reach to pass through thick door leaves and decorative handle backplates while maintaining key access from both the inside and the outside.

The 80mm Euro Profile Double Cylinder(Key/Key) configuration is the primary choice for external entry points. Unlike a thumbturn, which can be operated by anyone inside the building, a double cylinder requires a physical key to retract the deadbolt from either side. This is an essential safety feature for doors with glass panels or side-lights, as it prevents an intruder from smashing the glass and simply reaching in to turn a knob.

Why Choose an 80mm Offset?

The 80mm length is typically used for door thicknesses ranging from 54mm to 64mm. It is most commonly found in two configurations:

40/40 (Symmetrical): The fixing hole is perfectly centered. Ideal for thick timber doors where the mortice lock is dead-center.
35/45 or 30/50 (Asymmetrical): Essential for modern composite doors where the external face has thicker decorative moldings or weather-stripping, shifting the locking point off-center.

Technical Specifications & Features of 80mm Euro Profile Double Cylinder

Feature	Detailed Specification
Total Length	80mm
Type	Double Cylinder (Keyed both sides)
Profile	Standard Euro Profile
Security Ratings	BS EN 1303 & TS007 (1-star or 3-star)
Material	Solid Brass (Available in Satin Nickel, Brass, or Chrome)
Security Features	Anti-Snap, Anti-Pick, Anti-Drill, and Anti-Bump

Recommended High-Security 80mm Cylinders

For the highest level of residential protection, the Yale Platinum 3-Star is the industry benchmark. It is Sold Secure Diamond approved and TS007 3-Star rated. If an intruder attempts to snap the lock, the barrel features a sacrificial “snap-line” and a unique “V-Pin” that locks the central cam, keeping the door deadlocked.

For a robust, professional-grade solution for commercial or secondary entry points, the ERA 6-Pin Euro Cylinder offers exceptional durability. It features multiple hardened steel anti-drill pins and a 6-pin “mushroom” driver system that makes picking nearly impossible for standard intruders.

Installation & Measuring Pro-Tip

To ensure you have the correct 80mm size, always measure from the center of the fixing screw hole to both ends of the cylinder:

Internal Measurement: Center of screw to the internal edge of the barrel.
External Measurement: Center of screw to the external edge of the barrel.
Total: The two measurements combined should equal 80mm.

Safety Warning: A 80mm Euro Profile Double Cylinder should never protrude more than 3mm from the face of the handle. If the cylinder sticks out too far, it becomes an easy target for “lock snapping” tools. Always choose the size that sits most flush with your handle furniture.

Enhance your door security with this 80mm Euro Profile Double Cylinder, designed for reliable performance, smooth operation, and long-lasting durability. Each cylinder comes with its own unique key, providing independent access control for residential, commercial, and multi-unit properties. The 80mm Euro profile ensures a secure and precise fit for standard doors, making it a practical and robust locking solution.

Crafted from premium-grade materials, this 80mm Euro Profile Double Cylinder offers strong resistance to tampering, forced entry, and daily wear. Its keyed-to-differ feature allows each cylinder to operate independently, making it ideal for apartments, offices, and multi-door installations. Easy to install and designed for long-term use, this double cylinder lock combines strength, convenience, and peace of mind.