For boring and sizing on solid wood, chipboard and fibre materials (MDF - HDF).
RH Z = 3 Down-cut spiral. Manufactured with micrograin solid carbide HW. With 3 positive spiral cutting edges and upward chip evacuation (code 4225) for excellent finishing on the bottom panel surface or negative spiral cutting edge with chip evacuation toward the bottom (code 4226) for excellent finishing on the top panel surface. Special BUPDIA Coating improve chip evacuation granting longer cutting life respect to a non-coated cutter.