Designed mainly for anal use (though that rule isn't written in stone,) the eight inch long Rib it is made out of firm and smooth rubber that facilitates insertions due to its lack of friction.
But the shaft is still long and rigid, so beginners might want to take it slow at first. As for its contours, the tip is round and emphasized, below that are a pair of wide but subtle ribs and the shaft broadens downward towards an even flared base.
And as is the case with all wide based toys, this one is also harness compatible.
So depending on what you're looking for in an anal toy, this could be the perfect one for you.