90 Degree 0 Flute HSS Countersink Deburring Bits Features:

1.This bit should use the bench drill , it is easy to shake and it will affect the chamfering effect if you use the hand drill.

2.High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.

3.Ideal for cutting through metal, wood and plastic (hardness <25 degrees)

4.Round shanks allow use with a wide variety of toolholding systems. 

5.Used for workpiece circular aperture chamfering or cone hole

6. Other degree / shank type / specifications are available