Pro-Series Precision Punch Grinder ~ Can be used on the surface of grinding machines for grinding round punches that are 1.5-25mm or 0.059-.984″ in diameter. ~ Extended grinding length is 5-35mm or .197-1.378″. ~ It can grind cylindrically automatically. ~ Punches can be ground by adjusting three rollers of punch grinder without checking the center. ~ Accuracy of the roller is within 0.005mm or 0.0002″. Can be used on the surface of grinding machines for grinding round punches that are 1.5-25mm or 0.059-.984″ in diameter. Extended grinding length is 5-35mm or .197-1.378″. It can grind cylindrically automatically. Accuracy of the roller is within 0.005mm or 0.0002″. Punches can be ground by adjusting three rollers of punch grinder without checking the center.