High-speed steel drill core
Precise positioning, will not shift, wood chips will automatically discharge from the holes on both sides at the top of the drill bit, will not jam the drill bit.
Electroplated
5/64'': Hole diameter approximately 2mm, suitable for self-tapping screws around 2.2-2.8mm
7/64'': Hole diameter approximately 2.8mm, suitable for self-tapping screws around 3-3.5mm
9/64'': Hole diameter approximately 3.5mm, suitable for self-tapping screws around 4-4.5mm
11/64'': Hole diameter approximately 4.5mm, suitable for self-tapping screws around 5-5.5mm
5mm: Hole diameter approximately 5mm, suitable for self-tapping screws around 5.5-6mm
13/64'': Hole diameter approximately 5.2mm, suitable for self-tapping screws around 6-6.5mm
1/4'': Hole diameter approximately 6.35mm, suitable for self-tapping screws around 7-7.5mm

