There are basically two types of sausage stuffer, namely vertical and horizontal. For both types, you usually need a table edge to attach them to. However, there are also models that have a suction cup, are free-standing or can be held by hand.
Vertical sausage fillers are usually easier to fill and less sausage remains in the cylinder. But you can also achieve good results with horizontal sausage fillers. However, they are not so good for thin sausage meat.