Drill bit ni ubwoko bwibikoresho bikoreshwa cyane mumashini yacu yo kubaka.Ikoreshwa mu gucukura mu mwobo cyangwa mu mwobo uhumye ku bikoresho bikomeye, kandi irashobora kwagura ibyobo bihari.Ariko, ubwoko bwa drill bits duhitamo buratandukanye mubikorwa bitandukanye.Imyitozo ikoreshwa cyane biti ...