Ball Point (Style 2045) needles are used for sewing on knits; the rounded tip allows the needle to pass between the fabric threads by separating them.
Sheer to Lightweight Knits 80/11: Jersey, Single Knit, Spandex, Tricot
Medium to Heavy-weight Knits 90/14 or 100/16: Double Knit, Sweatshirt, Sweater Knit
(Using a regular point needle on knit fabric will result in skipped stitches and fabric damage, causing it to curl.)
Excellent selection for my needs and reasonably priced.
Thank you for your fast service in delivering the above needles. Singer is my go to company for anything to do with sewing machines.