The Importance of Needle Points and Number of “SPI”
Using the correct needle point and Stitches per Inch (SPI) can make the difference between a good strong seam and on the “tears along the dotted line”.
Needles come with several point designs, three of which are shown below:
All three have specific uses, but for stitching fabric, fabric backed materials, “side” (or “garment tanned”) leather or [...]