Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 29.0mm with an overall length of 185mm and flute length of 100mm according to DORMER standard for 3xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 28.97 up to 29.77mm
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