·Ifasha gukuraho ubushyuhe mu gice kirekire no hagati mu burebure bw'insinga
·Ubujyakuzimu bwo gukata bushobora guhindurwa
·Ifasha gukata mu buryo burambuye, mu buryo buzunguruka no mu ruziga
·Ifite icyuma gizunguruka
·Ifite agapfundo ko gukosora umugozi w'umuheto
·Igipimo (Ø10, 15, 20, 25 mm) ku mupaka w'umuheto