Feature

●■ Unique spiral flute allows you to open the aperture of various specifications
●There is no need to use a center punch and it is less likely to break compared to regular drills
●Deburring, chamfering, enlarging oval holes, and unusable functionality is possible
●Tools used: Drill, bench drill. When working with water cooled, it can effectively extend the service life of the drill bit, we recommend the drilling speed of 250-400 RPM
●Cutting Material: Iron plate, aluminum, wood, insulation board, PVC board within 0.2 inch (5 mm) thick. Use drill to create various grommets


Description

4-22mm Hex Screw Drill HSS Spiral Step Cone Drill Bit Titanium Carbide Drill Tool Step Drill Bit
■ Unique spiral flute allows you to open the aperture of various specifications.
There is no need to use a center punch, and it is less likely to break compared to regular drills.
Deburring, chamfering, enlarging oval holes, and unusable functionality is possible.
Tools used: Drill, bench drill. When working with water cooled, it can effectively extend the service life of the drill bit, we recommend the drilling speed of 250-400 RPM.
Cutting Material: Iron plate, aluminum, wood, insulation board, PVC board within 0.2 inch (5 mm) thick. Use drill to create a variety of grommets.
* Color: Gold (As the picture shows)
Material: High Speed
Surface: Titanium coating.
Standard: 0.2 - 0.9 inches (4, 6, 8, 10, 12, 14, 16, 18, 20, 22 mm)
Package Includes: 1 x Step Drill Bit