through hole drill bits
-
HW dowel drills with 3 cutting edges
•New design—Crown head with patent.
•HW head is with precise balance center point.
• 3 precise ground cutting edges (Z3).
• 3 spiral grooves. -
4 flutes industrial dowel drill for through hole drilling
•This standard industrial dowel drill is made of original ultra fine tungsten carbide.
•The high strength steel body has been undergoes petrochemical treatment to avoid deformation
•The spiral part has P.T.F.E.
•Double angle.
•2 precise ground cutting edges (Z2).
•4 spiral grooves.