Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 27.0mm with an overall length of 320mm and flute length of 234mm according to DORMER standard for 8xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 26.99 up to 27.78mm
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