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