They say that the chain is "anti-rebounds", it's a pipe?
The so-called "anti-rebound" chain includes spacers which increase the height of the parts located between the gouges, which limits the engagement of the latter when they are at the end of the guide, however for purely geometric reasons (in this area the gouges are on a tangent), this can only limit the extent of the rebound and not really eliminate it: this nevertheless constitutes (which is better than a nose less! ) progress for amateur and novice users.
There are, apart from this type of chain, several ranges which correspond to different uses: from the very aggressive, dangerous, but very productive model, for intensive slaughter, to chains that are a little less efficient, but more "softer". in use...
There are also variations in the shape of gouges: from the square, aggressive and with the more fragile edge, to the opposite round, passing by the half-round which is a good compromise for a varied use ( the professional changes channels according to his projects).
Note: some amateur machine manufacturers go even further and provide the nose of the guide with a housing that does not allow end cutting, but this greatly restricts use.