Ibikoresho by'ingufu Ibikoresho Bitobora Bit HSS Twist Drill

Imyitozo ya M2 ya biti ifite ubukana bwa 64° nyuma yo gutunganya ubushyuhe bwinganda, bufatanije nubukomezi bwiza, butuma imyitozo irushaho kwambara, kuramba no kwihanganira ubushyuhe. Gupfa ibyuma munsi ya 30°ni byiza cyane