Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 20.0mm with an overall length of 264.5mm and flute length of 175.5mm according to DORMER standard for 8xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 19.6 up to 20.5mm
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