Tools for opening closed but not locked doors
Can someone please explain the difference between a locked door as most of us know it (ie lock with pins etc) and a closed door that needs special tools to open.
Is this something one encounters in Europe more than North America?
I notice they sell those very spiral wire tools that look like a streched out corkscrew for this purpose.
What are single and double offset doors?
For the opening of closed but unlocked single-offset doors opening to the outside as may be found in public buildings. In order to insert the tool into the gap between frame and door it is often necessary to broaden this gap using a suction cup or our Multi-Opener. The tool is made of spring steel and approx. 1 mm thick.