![self centering drill bit](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)
Self Centering Hinge Drill Bits:
5/64": Hole diameter is about 2 mm, which is suitable for self-tapping screws of 2.2-2.8 mm.
7/64": Hole diameter is about 2.8 mm, which is suitable for self-tapping screws of 3-3.5 mm.
9/64": Hole diameter is about 3.5 mm, which is suitable for self-tapping screws of 4-4.5 mm.
11/64": Hole diameter is about 4.5 mm, which is suitable for self-tapping screws of 5-5.5 mm.
5mm: Hole diameter is about, which is suitable for self-tapping screws of 5.5-6mm.
13/64": Hole diameter is about 5.2mm, which is suitable for self-tapping screws of 6-6.5mm.
1/4": Hole diameter is about 5mm, which is suitable for self-tapping screws of 7-7.5mm .