Klasse Machine Needles go through 163 quality checks, earning the industry's highest quality rating for: stability at high speeds, seam appearance, clean stitch holes and precise and uniform stitchability. Each needle has a unique number stamp identifying its point style and size when separated from the package. Twin needles are for stitching two rows simultaneously to create decorative effects for heirloom sewing, pin tucks, and fancy hems. Twin Machine Needle Ballpoint 4.0mm/80 1pc- System 130/705H, 15x1, HAx1. Suits all modern sewing machines. Package contains 1 size 80/12 needle. Distance between needles is 4.0mm.