The circle makes a fairly stable impression and is 1a in hand and can be operated excellently.
The arm of the compass are studded (just like the ergonomically shaped pencils by Faber Castell) and therefore non-slipping.
By something Pushing or pulling firmly to the legs of the compass can be adjusted quickly. A somewhat finer adjustment (if necessary) via the set screw is possible (in the center of the spindle).
The set radius remains optimal (even with some inexperienced hands).
You can either use a very fine (almost surgical) or a "normal" tip. Refills are also available.
Even the look of the circle is a real hit.
The full score and Recommendation.
