Breynet Self-centering drill bit, Wood Doors Self Center Hinge Core Tapper Drill Bit Set Hole Puncher Woodworking Tools 5/64'' 7/64'' 9/64'' 11/64'' 13/64'' 5mm 1/4'' 7pcs

Specification: Material: high-speed steel all shank size: 1/4" Hole Size: 5/64", 7/64",9/64" 11/64", 5mm, 13/64", 1/4" Type & Dimension: 5/64'': Hole diameter is about 2mm, use about 2.2-2.8mm tapping screw. 7/64'': Hole diameter is about 2.8mm, use about 3-3.5mm tapping screw. 9/64'': Hole diameter is about 3.5mm, use about 4-4.5mm tapping screw. 11/64'': Hole diameter is about 4.5mm, use about 5-5.5mm tapping screw. 5mm: Hole diameter is about 5mm, use about 5.5-6mm tapping screw 13/64": Hole diameter is about 5.2mm, use about 6-6.5mm tapping screw. 1/4": Hole diameter is about 6.35mm, use about 7-7.5mm tapping screw. Note: 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. Package Contents:7pcs Hinge Hole Drill Bits