The ProChip 4 flashers are made for catching trout and kokanee.  The flasher is 4 inches long and has a diagonal kicker fin on the back.  This gives the flasher an eratic spinning and kicking action.  It contains the Pro-Troll electronic EChip and has Pro-Troll "Easy Spin" ball bearing swivels on both ends.  For trolling less that 1 MPH, the flasher can be rigged for slow troll.  See the instructions inside the flap of the flasher package.