Munzvimbo yokudhora oiri negasi, kusarudza kubudisa zvinhu zvinoita basa rinokosha mukushanda nokubudirira. Chimwe chishandiso chinokosha chakadaro i8 1/2 tricone bit. Rudzi urwu rwakagadzirirwa nenzira yakananga nokuda kwokushandiswa mumabwe akasiyana - siyana uye runoremekwa zvikuru nokuda kwokushandisa kwaro nokubudirira mubasa rokudhira. Bit tricone inoumbwa namacones matatu anotenderera, eq imwe neizwa