Hariho ubwoko bwinshi bwimigozi ihuriweho, harimo imigozi ibiri ihuriweho hamwe ninshuro eshatu zahujwe (gukaraba neza hamwe no gukaraba amasoko cyangwa gukaraba neza hamwe no gukaraba) ukurikije ubwoko bwibikoresho byahujwe; Ukurikije ubwoko bwumutwe, burashobora kandi kugabanywamo ibice byo guhuza imitwe ya pan, guhuza imitwe ya comptersunk, imiyoboro yo hanze ya mpande esheshatu, nibindi; Ukurikije ibikoresho, igabanijwemo ibyuma bya karubone, ibyuma bitagira umwanda hamwe nicyuma kivanze (Icyiciro cya 12.9).