There is a vibration damping structure inside the holder that enables high feed rate of the end mill at higher speed and deeper cuts.
The holder has increased rigidity and the surface roughness is excellent even with high speed and deep cut. Roughing and finishing can be done with one piece.
High gripping force is achieved with the 1/10 taper and double taper method, and the end mill does not come out even when processed at high speed and high feeding.