Self-Threading - No. 90 Needles for Heavyweight Fabric - Eliminate eye strain entirely with this self-threading needle. Now those with low vision can stop squinting and straining, and get back to what they love most, sewing! These low vision sewing machine needles provide effortless threading, as they automatically thread themselves. 5 sewing needles per package. These sewing machine needles are made to fit most sewing machines manufactured within the last 25-30 years.