Chrome RotoChip head unrigged.  This unrigged head can be rigged with any hook setup.  Some fishermen prefer to rig with a single hook and others use tandem hooks.  This model has a 1/2 inch high diagonal fin on the bottom which causes an erratic rolling action on the baitfish.  For the Big Fin model see the 4500 series.  When the wire slider is moved forward, the head automatically springs open.  Insert the head of your baitfish and slide the wire backwards until the baitfish is held in position.  To see how these items are typically rigged, call up the RotoChip Baitholder on the main menu.  Each head contains the Pro-Troll electronic EChip electronic attractor.  As the baitholder wiggles the EChip discharges a tiny electrical pulse that exactly duplicates the nerve discharge of a wounded baitfish.
It is one of the best salmon producer in the series.  The item comes three to a pack.