You wouldn't think these spiky things could make a significant difference to your stitching, trust me, they sure can.
I really don't know much about needles. I always use denim needles as I'm usually sewing through thick layers of fabric. Apart from this my knowledge about sewing machine needles is zip, nada.
Thankfully the lovely Lisa Lam of U-Handbag has come to our rescue once again and posted a great blog all about the oh so spiky ones.
She clearly explains needle size and the different types and their uses right here.