Euro Cylinder Sizes Explained: Why the Right Fit Matters
If your door cylinder sticks out past the handle, it's easier to snap. Here's why euro cylinder sizing matters for your security.
How euro cylinders are measured
A euro cylinder is measured from the central fixing screw to each end — for example 35/45. The two halves can be different lengths to suit the door thickness and where the lock sits. Getting the right size means the cylinder fits flush.
An incorrectly sized cylinder either won't fit or, worse, protrudes past the handle.
Why a protruding cylinder is dangerous
If the cylinder sticks out more than a few millimetres past the door furniture, an intruder has something to grip and snap. A flush-fitting, correctly sized anti-snap cylinder removes that vulnerability.
This is one of the simplest security details people don't realise affects their safety.
Getting it right
A locksmith measures your door and fits a correctly sized, anti-snap cylinder that sits flush — improving both security and appearance. It's a quick, affordable job.
If your cylinder protrudes or you're unsure, we can check and replace it across Catford and South East London.
Popular locksmith services
Every visit is handled with a security-first approach. We check the door, frame, keep, cylinder, handle, closer or mechanism before recommending a repair, so customers understand whether the fault is a simple adjustment, a lock replacement, a UPVC gearbox failure, a commercial door alignment issue or urgent make-safe work after damage.
For local SEO and customer clarity, this page connects the main Catford locksmith service with nearby South East London areas and the exact services customers search for. The business covers urgent and booked work for homes, rented flats, landlords, shops, offices, salons, restaurants and other local premises that need a reliable locksmith or commercial door specialist.
- Emergency locksmith response in Catford and SE6
- Domestic lock repairs, lost keys and lock replacements
- UPVC door locks, multipoint mechanisms and anti-snap cylinders
- Commercial locksmith work, shop doors and door closer repairs
- Burglary repairs, boarding up and same-day make-safe support
Related local pages
Call 07557 957349 or send an enquiry for locksmith help from Bromley Rd, London SE6 2TS. You can also view the local base on Google Maps.