Ball point needles have a rounded tip that slides between knit loops instead of piercing them, helping prevent runs, holes and skipped stitches. Size 70/9 is suited to lightweight jerseys and fine knits on most home machines. Ideal for T‑shirts, rib cuffs and delicate stretch fabrics using polyester or poly/cotton threads. Replace regularly to keep elastics and knits looking smooth. Choose needle size according to fabric weight for best results.