Universal (Style 2020) needles are used for all woven fabrics. This needle will penetrate the fabric threads of woven fabrics. Heavy duty 100/16 size.
Medium to Heavy-weight 100/16: Coating, Damask, Drapery Fabric, Fake Fur, Gabardine, Ticking, Woolens
To be honest I think I ordered wrong needles, though I'm having problems with my machine sewing properly so haven't used yet, they look slightly smaller than the ones I have already, though size 14/90
I made several strong canvas shopping bags using these needles and thick cotton thread. I had no problems. Still using the bags now three years old and My heavy duty singer sewing machine 4423 is also doing well.. Just needed a little help when sewing over 10 layers of canvas.