This EChip kit contains three large size EChip (3/4" long). In addition it contains mounting hardware to mount the EChip five different ways. These include shrink tube which can be used for a slider mount on a leader or a wire, shrink tube that can mount the EChip permanently on a hook shaft and a barbell mount that can mount the EChip between the body and hook of a spoon or a jig. The kit comes with complete instructions.