Replaceable head drill body HYDRA with DIN 6535HE NC whistle notch shank, size 1.1/64" with an overall length of 170mm and flute length of 88mm according to DORMER standard for 3xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 0.9843 up to 1.0156" (1.1/64)
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