[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. ●Due to the adoption of 2 oil holes (7.5 mm or more blade diameter) or a kidney shape (7.0 mm or less blade diameter), 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).