Marcel Gillen, designer and maker of this puzzle, is not only known for his maze puzzles but also for his bolts. There were several bolts, the look is pretty similar but the challenges are not exactly the same.
This is not a spoiler what I will say: this is a maze! You will find out soon that you need to solve a bolt maze, as you will hear the famous "click" sound that indicates you've been trapped and may restart from the beginning.
This is a challenging puzzle (like all Marcel Gillen's by the way!). I like the feature with the pin as I think this was a very advanced stage of the puzzle maze puzzles in its kind before the revomaze puzzle. This is the most challenging bolt puzzle you can find. But well, usually bolt puzzles are also called "trick bolts" and don't involve a lot of steps. This bolt puzzle is not a trick bolt.
Needless to say that the quality is very good and that you will have to deal with a pretty heavy brass puzzle
Maybe I can submit you another challenge whether you have or not played with this puzzle: find a way to cheat to solve quickly the puzzle.
Cheating is a way of puzzling sometimes ;-)