Achịkọ okpu na igwe anaghị agba nchara hexagon slotted nut nwere ntụtụ gbawara agbawa, nke dabara na ịghasa nwere oghere oghere.A na-eji ya eguzogide vibration na ibu ndị ọzọ, ọ pụkwara igbochi akị ka ọ ghara ịtọpụ ma pụta.