Extra strong string to wind, for instance, into the depression around the middle joint. Dia.:0.75mm,length:300m. Material: Vinylon (artificial fiber)
Triangular File, ¥1100
Wooden Joint Section Insert S, ¥880
Cherry Tree Bark, ¥1320
Middle Joint Insert Tool A (with handle), ¥6655
Joint-Forming Tool-M, ¥8470