Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 21.0mm with an overall length of 196.5mm and flute length of 119.5mm according to DORMER standard for 5xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 20.64 up to 21.5mm
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