Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 27.0mm with an overall length of 175mm and flute length of 94mm according to DORMER standard for 3xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 26.99 up to 27.78mm
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