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Spring steel shaft: For preventing deformation.
Screw point tip: For pulling the bit through the wood easily.
Flute: For ejecting the chips faster.
Fisth hole: (Tip/Shank): For using together with wire or the grip of the cable.
Precision welding technology:
A. Clean and beautiful welding - Without any welding salg.
B. Strong welding - With stand the torque more than 300 pounds.
C. Precision wdlding - With homocentric rotation provides accurate and smooth drill.
For installing the wire, telephone cable and internet cable.
Country of Origin TW-Taiwan