Impressioning is one of the quietest break-in techniques: the burglar makes a working key for your lock by reading the tiny marks the pins leave on a blank, opening the door with no noise and no signs of forced entry. Here is what it is and, more importantly, how to protect your home in Fuengirola.
What is lock impressioning?
The intruder inserts a soft blank key into the cylinder and turns and wiggles it. The internal pins leave small marks on the blank. Filing where the marks appear, and repeating the process, they gradually shape a key that opens your lock. It takes patience and skill, but it is completely silent and leaves the door intact.
Why it is a problem
- No signs of forced entry — like bumping, it leaves no visible damage.
- Insurance — a break-in with no marks can be harder to claim.
- Works on basic cylinders — standard, unprotected cylinders are the easiest targets.
How to protect against it
High-security cylinders are designed to resist impressioning. They use anti-manipulation pins, tight tolerances and special mechanisms that stop the technique from working. Fitting a Keso, DOM or Abus cylinder is the reliable defence — and in most doors it is enough to change just the cylinder.
Frequently asked questions
What is lock impressioning?
A technique where the burglar makes a working key by reading the marks the pins leave on a blank. It is silent and leaves no signs of forced entry.
How do I protect against it?
High-security cylinders with anti-manipulation pins and tight tolerances resist impressioning. A Keso, DOM or Abus cylinder is the reliable defence.
Would my insurance cover a break-in with no marks?
It can be harder to claim when there are no signs of forced entry — another reason to fit a high-security cylinder and keep a proper invoice.
Want to protect your lock in Fuengirola?
I'm Santiago, an APFC-certified locksmith in Fuengirola and Mijas. I fit high-security cylinders that resist impressioning, with a fixed price and an invoice, every day from 8am to midnight. Send me a photo of your cylinder on WhatsApp and I will advise you.
Need a locksmith in Fuengirola?
Santiago answers in person, with a closed quote before starting.
