My good buddy Jim gave this to me, its called a Yo-Yo survival fishing rod. Basically, it operates off of tension and is like a trot line. You nail or tie this little thing in a tree, stretch the line out and the line "catches" on a cut out (think window blinds how you pull the line out, but pull it forward and it snags until pulled again) and attach either a leader or hook. When fishy bite and move, the line un-locks its'self and keeps tension on the line and fishy on the end till you get back. It is small like a can of snuff and super cheap, going in my bag-O' stuff for use