Specification：Product Name: Hexagon Shank Hinge Drill BitProduct Material: High Speed Steel +BrassProduct Color: SilverHandle Diameter: 1/4”/6.35mmHandle Type: Hexagonal HandleProduct Size: As ShownHole Diameter:5/64": The diameter of the cut hole is about 2mm, suitable for 2.2-2.8mm self-tapping screws7/64”: The hole diameter is about 2.8mm, suitable for 3.0-3.5mm self-tapping screws9/64": The hole diameter is about 3.5mm, suitable for 4.0-4.5mm self-tapping screws11/64": The hole diameter is about 4.5mm, suitable for 5.0-5.5mm self-tapping screwsPackage included：4PCS Hexagon Shank Hinge Drill Bit