This is a light Dobon through-line rig that can be connected to a balanced bottom fishing rig with a single touch. In the harsh cold of wild fishing, or when the fish are very finicky, it seems that the bait doesn't completely settle with balanced bottom fishing or external through-line rigs, and wary hera carp may not bite. In such cases, a through-line rig where the hook length also settles on the bottom and doesn't move even when the bait dissolves might be effective. Through-line rig: 0.3g weight x 2 sets, Through-line rig: 0.5g weight x 2 sets, Through-line rig: 0.8g weight x 2 sets The line used is size 5. To use, remove the hook length from your bottom fishing rig and attach the snap of the Dobon rig there. Set the hook lengths on the swivel. Shorter hook lengths (top 10cm, bottom 15cm) seem to provide better sensitivity, but longer ones are common these days. I use longer hook lengths (top 10cm, bottom 50cm) when using okame (a type of bait) on the bottom hook. Also, when returning from Dobon to balanced bottom fishing, before switching to Dobon, attaching a line stopper to the lower float stop will make this position the balance level, and returning the float to this position eliminates the need for depth adjustment. Also, when switching to Dobon, you can leave the balance weight and float as they are, but by increasing the float size without cutting the weight, you can make it sink slowly. Since you haven't cut the weight, you can easily return to balanced bottom fishing by returning the float size. Please note that returns and claims are not accepted.