Thanks Doilum I saw that one, what does it fit into?
It doesn't use a die so the rivets are not quite as shapely as the press type. You experiment with materials under the work. Cornflake box card works well.
The advantage over the simple hammer type is the weight of each drop is consistent. It also doubles up as a centre punch for accurate drilling.
If you are starting out on a long scratchbuilding career, a press that controls the pitch and keeps a straight line is a worthwhile, if expensive investment. Unless funds are unlimited, each tool needs to justify its purchase.