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This auction Brand New 7pcs Self Centering Hinge Hardware Drill Bit Set Pilot Hole Guides Door Drawer HSS Self Centering Hinge Drill Bits Set Door Cabinet Window hinge hinge hole opener Woodworking punch

Features:

* High speed steel drill bits, with 7pcs
* Positioning accuracy, will not shift
* Suitable for wood window or door tapping
* Drilling and tapping, high working efficiency
* High hardness, rustproof, solid and durable
* Fast replacement composite cone, uses drill edged principle
* The chips automatic discharge from either side of the top of the drill hole
* The bits are surrounded by spring loaded guides that have a widow to show

Specifications:

Material: High-Speed Steel
All shank size: 1/4"
Hole They come in the 3 most common hinge screw sizes 7/64",9/64", & 11/64".
The 7/64" is good for drilling holes in smaller hinges and hardware like decorative boxes.
The 9/64" is ideal for medium to full size hinges and hardware.
The 11/64 is perfect for door hinges, gate locks and all large hardware.

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 - 4.5 mm tapping screw
11/64 : Hole diameter is about 4.5mm,Use about 5 - 5.5 mm 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

Package List:
1 x 7PCS Self-centering Drill Bits