Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 18.0mm with an overall length of 141.5mm and flute length of 66.5mm according to DORMER standard for 3xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 17.6 up to 18.5mm
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