3-Packs of RotoChip Bait Holder Heads Three RotoChip bait heads unrigged in a package – each with an EChip embedded in the head. This is the best way to buy EChips for your bait – especially for those who like to rig their own hooks and leaders. The embedded EChip bait technology duplicates the electrical nerve discharge of live bait, which triggers strikes by nearby predators. Field tests worldwide indicate the EChip improves catches by up to ten to one.