S-type, diameter 11.5cm, thickness 5.2cm, set of 2. When using a long leader in boat fishing, tangles often occur due to the flow of seawater caused by the water pipe when set at your feet. By winding the leader onto this round frame and casting, you can cast smoothly without tangles. I think there are various ways to use it. This item is in good condition, but it has been stored, so please understand that it is a used item.