Replaceable head drill body HYDRA with DIN 6535HB NC weldon shank, size 39.5mm with an overall length of 231.5mm and flute length of 136.5mm according to DORMER standard for 3xD drilling with HYDRA P (R950), HYDRA M (R960) or HYDRA K (R970) diameter 38.1 up to 39.5mm
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