Tuzobereye mugutezimbere no kubyaza umusaruro imigozi, nuts , bolt turn guhinduranya byikora, shafts hamwe na feri yihariye.Ibyuma byacu bifata ibyuma bikoreshwa cyane muri terefone zigendanwa, mudasobwa, icapiro, ibikoresho byo mu rugo, itumanaho, ibikoresho byo gufata mudasobwa, n'ibindi.