[macojoe]

long skinny sinker that goes on the leader, has a rubber insert so you can have it on the end of the line or far up the line. Or you can let it move up and down the line.
Use with plastic or rubber baites, great for weeds and rocks.
I have never used them but have heard about them. Looks like the work well!!

We use rubber core sinkers around here, for almost the same thing.