Isosiyete ikora impapuro zidafite gahunda zifite imiterere nuburyo butandukanye nkubwoko bwa wedge, ubwoko bwa cone triangulaire (ubwoko bwa piramide), ubwoko bwa cone bwaciwe, ubwoko bwa mpandeshatu ya Mercedes-Benz, imiterere ya arc, nibindi. byemewe, kandi imiterere yubuso irakanda kandi irashirwaho, ifite aho igarukira kandi ubukungu bwiza. Yakoreshejwe cyane mu gucukura no gucukura amabuye y'agaciro nka diyama, amabuye ya roller, amabuye y'agaciro, n'imashini zimenagura. Muri icyo gihe, birakwiriye cyane cyane kubice byihariye byimikorere ya PDC ya drill bits, nk amenyo yingenzi / afasha, amenyo yingenzi, hamwe namenyo yumurongo wa kabiri.