7-Piece Centre Drill Bits Set Self Centering Hinge Hole Drilling 1/4" Hex Shank

  • $13.69
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Product selling point:
  • The Shank of the stainless steel drill is 1/4'' inch.Suitable for the wood window or door tapping.
  • Fast replacement composite cone, uses drill edged principle.
  • Drilling and tapping, high working efficiency.
  • High hardness, rustproof, solid and durable.
  • Positioning accuracy, will not shift, the chips automatic discharge from either side of the top of the drill hole, don't stick drill.
Usage instruction:
  • Please adjust according to the hardness of the wood, if the wood is soft, choose a smaller size;
  • If the wood is hard, you can choose a larger size or corresponding opening tool.
  • Accurate drilling exact pilot holes in cabinet door hinges, door butts, handles, drawer slides, and more.
  • 5/64'': Hole diameter is about 2 mm,Use about 2.2 - 2.8 mm tapping screw
  • 7/64'': Hole diameter is about 2.8 mm,Use about 3 - 3.5 mm tapping screw
  • 9/64'': Hole diameter is about 3.5mm,Use about 4 - 4.5 mm tapping screw
  • 11/64'': Hole diameter is about 4.5mm,Use about 5 - 5.5 mm tapping screw
  • 1.97"/5mm: Hole diameter is about 5mm,Use about 5.5 - 6 mm tapping screw13/64'': Hole diameter is about 5.2mm,Use about 6 - 6.5 mm tapping screw
  • 1/4'': Hole diameter is about 6.35mm,Use about 7 - 7.5 mm tapping screw
Please Note: The silver set and black set are the same but only the color.