Centerpin, hard to explain. Kind of the combination of a fly rod and baitcasting rod. The spool is free flowing (though it appears similar to a fly rod and is casted some what similar to a fly rod). Though it is fished with baitcasting and/or spinning gear.

Not a very good explaination, but if you would like to know more look some info up on the internet.

Popular for big fish in river systems around here.