KLASSE embroidery needles are designed for machine embroidery with rayon, polyester, cotton, or acrylic embroidery thread. This pack includes size 80/12 embroidery needles for domestic machines, featuring a specialty coated, larger eye for smoother thread flow during dense designs. Use stabilizer suited to the fabric and replace needles regularly to reduce thread breaks, fraying, and skipped stitches as you stitch at speed.