The Roto Chip Bait Head is for fishermen who want to rig their own. This head has two advanced features over the Rotary Salmon Killer head. First, it springs open automatically when the wire clip is moved toward the front. The head of a bait can be inserted and then slide the clip towards the rear until the head of the baitfish is secure. This head also includes the electronic EChip mounted in the nose which triggers more strikes. The price shown includes a three pack of each head.