U-igice cyicyuma nubwoko bwicyuma gifite igice cyambukiranya nkinyuguti yicyongereza “U”.Ibiranga nyamukuru ni umuvuduko mwinshi, igihe kirekire cyo gushyigikirwa, kwishyiriraho byoroshye no guhindura ibintu byoroshye.Ikoreshwa cyane cyane mumuhanda wamabuye, inkunga ya kabiri yumuhanda wanjye, no gushyigikira umuyoboro unyuze mumisozi.