Extra strong string to wind, for instance, into the depression around the middle joint. Dia.:0.75mm,length:300m. Material: Vinylon (artificial fiber)
Wooden Joint Section Insert S, ¥880
Mentori 2-rin (width:0.7mm), ¥14850
Middle Joint Rasp B, ¥10230
Triangular File, ¥1100
Joint-Forming Tool-M, ¥8470