Han Fey finished yet another article for the toool website.
This time he wrote about a special and exotic lock, the Drumm Geminy shield.
 
This lock actually is protecting the original lock in the door against
vandalism. It’s a very clever design and the article is well worth the read.
Han always spends a lot of time writing his articles and I am sure you
will enjoy it.
Other articles from his hand are:
Cutaway locks
Abloy classic (part1)
Abloy Disklock/Exec (part2)
Abloy Protec (part3)
Abloy special products (part4)
DOM IX dimple lock