Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 31/64" with an overall length of 130mm and flute length of 69mm according to DORMER standard for 5xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 0.4688 (15/32) up to 0.4844" (31/64)
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