Overview
'Euro cylinder' and 'lock barrel' are the same thing - the removable brass unit at the heart of every composite door lock. Replacement is quick, but sizing matters: too long and it's a snap risk, too short and it won't engage the gearbox.
Symptoms
- Any need to change locks - new home, lost key, upgrade.
- Cylinder damaged or stiff.
- Insurance requiring 3-star spec.
Common causes
- Wear, weather, attack or lifecycle end.
When to call a professional
- Wrong-length cylinders are the #1 lock snapping vulnerability - get sizing right.
Prevention
- Fit anti-snap 3-star to TS007:2014.
- Ensure cylinder sits flush.