Iyo ugenzuye ubwoko butandukanye bwimigozi, urashobora kubona uduce duto cyangwa ibibyimba munsi yumutwe. Ibi byitwa nibs, kandi mugihe bishobora kugaragara nkibidafite agaciro mbere, bikora intego zingenzi mugukomeza porogaramu. Waba uri mubiti, gukora ibyuma, cyangwa kubaka, gusobanukirwa imikorere ya nibs birashobora kugufasha guhitamo imigozi ibereye kumushinga wawe kandi ukemeza ibisubizo byiza byihuse. Muri iyi ngingo, tuzibira mubyo screw nibs aribyo, uburyo bitezimbere imikorere, hamwe nibisanzwe bikoreshwa.