Originally Posted by Kitsie

Actually, GEMRM, the two (Sench and Spiraleye) are different. If you go to the web site: http://www.spiraleyeneedles.com/Needles.html
about mid-page down you will see an explanation of the difference. My understanding is that the self-threading needles are great for pulling down a loose thread, these others allow sewing along like a regular needle. I'm going to order some!