Feeder câu sông dạng inline (Inline feeder for river fishing)

This is a inline fishing feeder for rivers. I wanted my feeder to adaptable - the slot allows me to cut a strip of lead (treated for fish safety) and then by changing the size of this piece I can adapt the weight depending on the water flow. 

The bladed design is to help get the feeder to turn in the water flow so my hook ends up down stream. 

This design is for powdered and very small pellets. 

I will be testing this design over the summer and Ill update on its effectiveness. 

I had some off cuts of old lead strip which inspired the idea.