1. Back taper on side of the punch.
This specification makes better performance for less touching area on the side face of punch body and less sticking material on the side face.
2. ROLLERI tool is using slug catcher shape for die as standard specification.
This specification is effective to anti slug comes up.
3. Minute Corner R on the punching side edges.
ROLLERI put the minute corner R on the edge of the punching side edges because this corner is the weakest point of shaped tools. After put small R on the corner tool life is much longer and prevent the unusual wear of the punch body.