Game for the sysadmin day: guess the racks in our workshop by the handles?

We have a huge “zoo” of various iron in the test area. Below you will find a whole collection of handles from the cabinets. Some of them are rude but functional, and some are a real little engineering marvel.


one


2
')
The game is simple. You just need to say how many familiar pens you met . And guess one of them.



You need to guess this rack, pen without number:


The answer is below.


3


four


five


6


7


eight


9


ten


eleven


12



13


14


15


sixteen


17


18


nineteen


20


21


22


23


24

Answer

And yet next in the next closet there is such a wonderful pen:



PS If you have interesting pens - please add pictures to the comments.