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tungsten carbide tipped centring drill unit as a spare part for "Ceramic" diamond coated annular bits (Ø 18-83 mm) screw thread for screwing into the annular bits with centring drill bit that can be removed without tools
tungsten carbide tipped centring drill unit as a spare part for "Ceramic" diamond coated annular bits (Ø 18-83 mm) screw thread for screwing into the annular bits with centring drill bit that can be removed without tools