... such as the precise Yellow Gold punchB, the machine with a special chuck for round, rice shape, ... I, vise dust the bottom hole, so the machine can batch drilling (because when Pearl batch drilling ... cutting, to ensure the long-term normal use the machine. K, small size, light weight, beautiful appearance, ... work head can change the size to play Bore needles. Maximum chuck diameter ¢ 4mm for pearl, shells ...