[Features] ● A gundrill that enables efficient deep hole drilling with general-purpose machines such as machining centers and NC lathes. ●No need for guide bushes and guide plates because PILOT hole (guide hole) is used for processing. ●By adopting 2 oil holes (blade diameter of 7.5 mm or more) or a kidney shape (blade diameter of 7.0 mm or less), a large amount of cutting oil is discharged and chip discharge is excellent. ●If it is a horizontal general-purpose machine tool, it can be processed even with low cutting oil pressure (around 1.0 MPa).