They say that the chain is "anti-rebounds", it's a pipe?
The so-called "anti-rebound" chain includes spacers that increase the height of the parts 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 zone the gouges are on a tangent), this can only limit the extent of the rebound and not actually remove it: this is nevertheless (which is better than nose less! ) progress for amateur and novice users.
Apart from this type of chain, there are several ranges that correspond to different uses: from a very aggressive, dangerous, but very productive model, for intensive slaughter, to slightly less efficient chains, but more "soft" 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 his chain according to his projects).
Note: some amateur machine manufacturers even go further and provide the nose of the guide with a housing that does not allow end cutting, but this greatly restricts use.