Utoolmart 4.5mm Paper Punch Drill Taper Shank Hollow Bit Tool for Hole Puncher Punching Machine 2Pcs

When drilling, the drilled holes must not be repeated again. Otherwise, the drilled holes cannot be rounded, and the inside of the drilled holes will be blocked by paper scraps. Reasons for the blockage of punch drills: Papers are not tidy and uneven; gaskets are not put in right place or lubrication are not enough etc.; punched papers cannot be punched repeatedly; If the drilling size is small, the pressing rod speed should be slower; the drilling time is too long; the thickness of the drilling paper is too thick. Please wear work clothes and protective glasses to prevent the skin and eyes from being injured. Heat is generated during the drilling process. When the product is rotating, it is strictly prohibited to touch it by hand.