For the riveting is suitable only the die mold and press that is listed in the description. With any different type they can not be properly attached.
Punches with a smaller diameter than the grommet should be used for elastic fabrics. For solids, the diameter of the puncher should be the same as the diameter of the grommet.
Those irregularities, leading to the inclusion in the 2nd quality are not a reason for complaint.
