Knowledge base

Knowledge base: smart choices about locks and security

Practical guides without sales talk, written by the locksmith who will come to your door.

Articles

What would you like to know more about?

Clear, honest explanations without sales talk. Missing a topic? Feel free to ask via WhatsApp.

Locked out? What to do

Stay calm — the right steps to avoid damage and unnecessary costs.

Replace a cylinder: DIY or call a locksmith?

How a euro-profile cylinder works, when you can do it yourself, and why the right size matters.

SKG★ to ★★★ explained

Which star rating suits your front door, apartment or side entrance?

What does a locksmith cost?

Honest price breakdown and how to recognise a trustworthy locksmith.

What clients say

Rated 5.0 on Google

"I locked myself out on a Friday morning. I called Geen Probleem Sloten and, after a clear explanation of the prices and the work, Kai was on my doorstep within half an hour…"

Dámaris★★★★★

"Top service! After my call the locksmith was at the door within 20 minutes. Skilled, friendly and my door was opened without any damage. A truly reliable locksmith."

Bram★★★★★

"Fast and great communication! My key had snapped off and Kai was on the doorstep within half an hour. I was fairly panicked because it was late, but Kai kept me informed the whole time…"

Tom★★★★★

"He explained honestly that the lock unfortunately could not be opened without drilling. After drilling it out a new cylinder was fitted straight away and everything worked perfectly again. Good communication, clear prices and neat work…"

Tirzah★★★★★

"He delivers genuinely good quality at a fair price and works professionally and neatly. What I appreciated most is that I live outside his normal service area, but he still took the trouble to come out to me…"

Randall★★★★★

"You hear a lot of stories about scams and high prices, so I am always careful. Geen Probleem looked trustworthy…"

H.L.★★★★★

See all reviews on Google →