4PCS HEX SHANK DRILL BIT SET PILOT HOLES (SILVER)

4PCS Door Hinge High Speed Steel Hex Shaped Positioning Drilling Tool
Descriptions:
● It is designed to drill the hole of doors and windows. The drill holder can be well fixed which makes sure the accuracy of punching holes.
● The operation notice: When drill the hole, please adjust the size according to the hardness of the wood (The size are as followed).
● 5 / 64 inch: Hole diameter is about 2mm, use about 2.2 - 2.8mm tapping screw.
● 7 / 64 inch: Hole diameter is about 2.8mm, use about 3 - 3.5mm tapping screw.
● 9 / 64 inch: Hole diameter is about 3.5mm, use about 4 - 4.5 mm tapping screw.
● 11 / 64 inch: Hole diameter is about 4.5mm, use about 5 - 5.5 mm tapping screw.
● No matter what kind of occupation you are, this kind of hole punch is the secret tool for punching the hole.