A 72mm Euro Profile Double Cylinder is a high-specification lock barrel engineered for doors that require key access from both the internal and external sides. At a total length of 72mm, this 72mm Euro Profile Double Cylinder is the “workhorse” size for modern high-performance doors—including composite, uPVC, and thick timber fire doors—where standard 60mm or 70mm barrels are too short to clear the handle backplates.

The 72mm Euro Profile Double Cylinder configuration (Key/Key) is the gold standard for security. Unlike a thumbturn cylinder, which allows anyone inside to exit freely, the double cylinder ensures the door remains a solid barrier unless a physical key is present.

Key Advantages

Enhanced Glass Panel Security: If your door has a glass insert, an intruder cannot simply smash the pane and reach in to turn a knob. They would still require a key to retract the deadbolt from the inside.
Balanced Aesthetic: The symmetrical (or near-symmetrical) profile ensures the lock sits flush against the handle furniture on both sides of the door.
Anti-Snap Engineering: Most 72mm professional cylinders feature a “sacrificial cut.” If an intruder attempts to apply force to the lock, the cylinder snaps at a predetermined point, leaving the central cam locked and the internal mechanism inaccessible.
Master Key Compatibility: High-quality 72mm cylinders can often be “keyed alike,” allowing you to open your front, back, and side doors with a single master key.

Understanding the Measurements (The “Offset”)

Euro cylinders are rarely a simple 72mm block; they are measured from the central fixing screw hole to each end. For a 72mm total length, you will typically find two common variations:

36/36 (Symmetric): The fixing hole is exactly in the center. This is used when your multi-point lock is centered perfectly within a 44mm–54mm door leaf.
31/41 (Asymmetric): Often required for uPVC or composite doors where the external handle is further from the locking mechanism due to decorative moldings or weather-stripping.

Pro Tip: Always measure your old cylinder from the center of the screw hole to both ends. A cylinder that protrudes more than 3mm from the handle face is a major security risk, as it provides “purchase” for lock-snapping tools.

Technical Specifications of 72mm Euro Profile Double Cylinder

Feature	Detailed Specification
Total Length	72mm
Cylinder Type	Double (Keyed both sides)
Security Standard	BS EN 1303 & TS007 (1 or 3 Star)
Keying Pins	6-Pin High Security (Standard is 5)
Protection Features	Anti-Snap, Anti-Pick, Anti-Drill, Anti-Bump
Included	Fixing Screw and 3x Security Keys

Recommended 72mm Double Cylinders

For ultimate peace of mind, the Yale Platinum 3-Star is the industry leader. It is Sold Secure Diamond approved and TS007 3-Star rated, meaning it requires no additional security handles to meet the highest insurance standards. Its unique “traceable key” system allows you to order replacements only with a secure code card.

If you are looking for a reliable, mid-range solution for internal or secondary doors, the ERA 6-Pin Euro Cylinder offers excellent value. It features multiple hardened steel anti-drill pins and a 6-pin “mushroom” driver system that makes picking nearly impossible for standard intruders.

Maintenance for Longevity

To keep your 72mm Euro Profile Double Cylinder operating smoothly, never use WD-40 or oil. These attract dust and grit, which eventually “gum up” the tiny springs inside the 6-pin mechanism. Instead, use a dry graphite lubricant or a specialized PTFE lock spray once a year to ensure the pins move freely and the key slides in without resistance.

Enhance your door security with this 72mm Euro Profile Double Cylinder, designed for reliable performance, smooth operation, and long-lasting durability. Each 72mm Euro Profile Double Cylinder is supplied with its own unique key, ensuring independent access control for residential, commercial, and multi-unit properties. The 32/40mm Euro profile size provides a secure and precise fit for standard doors, making it a practical and robust locking solution.

Crafted from high-quality materials, this 72mm Euro Profile Double Cylinder resists tampering, forced entry, and daily wear. Its keyed-to-differ feature allows each cylinder to operate independently, making it perfect for offices, apartments, and multi-door installations. Easy to install and designed for long-term use, this 72mm Euro Profile Double Cylinder combines strength, convenience, and peace of mind.