Extra strong string to wind, for instance, into the depression around the middle joint. Dia.:0.75mm,length:300m. Material: Vinylon (artificial fiber)
Middle Joint Rasp A (With Handle), ¥10230
Joint-Forming Tool SET, ¥23650
Middle Joint Rasps A+B, ¥19580
3-rin rattan (width:0.9mm), ¥11550