ดอกสว่านเจาะเหล็ก แกนหกเหลี่ยม 6.35mm. Vessel "KESSAKU" Drill Bit KMD

High efficiency, speeding up tools * "Anomaly spiral shape" adopted. Spiral angle is moderate toward the shank side. Chips are exhausted smoothly， resulting in a high speed drilling. * X-shape(cross) thinning process helps the tip fit the object and drill a hole without punching. * Tip-end angle is as acute as 118°. Can drill a hole with a light force. * Sharp edge lasts as high hardness HSS steel is adopted.