A number of fishermen prefer to mount EChips on other lures to improve hookups. Pro-Troll makes two sizes of EChips and five different kits. The large EChip is 3/4" long and the small size is 1/2" long. Use the large size on big lures and the small size on small lures. There are several ways the EChips can be mounted. There are pictures of these here http://www.protroll.com/products/echip/kits/. on the Pro-Troll website. Each kit also comes with mounts and instructions on mounting.