Pro-Troll Fishing Products Roto Chip Bait Holder with Big Fin The Roto-Chip Bait Holder with an EChip has an easy slide locking device and requires no toothpicks, rubber bands, or wires Embedded EChip bait technology duplicates the electrical nerve discharge of live bait, which triggers strikes by nearby predators A diagonal fin gives the trolled bait the perfect rolling "wounded fish" action; the patented spacer tube holds the hook at the tail of the bait, which drastically improves the catch Size #5A is for baitfish or strip up to 5 inches long and size #5B (Big Fin model) for baitfish or strip up to 7 inches long Available in 11 colors and 2 sizes, it comes fully rigged with tandem 5/0 barbless hooks, 72 inch 40 lb. leader and 75 lb. test bead swivel