Dutanga ubwoko butandukanye bwubwoko bwa screw, harimo igikombe, point ya cone, point point, hamwe nimbwa, buri kimwe kijyanye nibisabwa byihariye. Byongeye kandi, imigozi yacu yashizweho iraboneka mubikoresho bitandukanye nk'ibyuma bitagira umwanda, umuringa, hamwe n'ibyuma bivangavanze, byemeza guhuza ibidukikije bitandukanye no kurwanya ruswa.