Metric Lock Nuts zose zifite uburyo bwo gukora ibikorwa bidahoraho "gufunga".Ikiganza cya Torque Gufunga Ibinyomoro bishingira kumutwe kandi bigomba gufungwa no kuzimya;ntabwo ari chimique nubushyuhe bigarukira nka Nylon Shyiramo Lock Nuts ariko kongera gukoresha biracyari bike.