This video shows how traditional sewing needles are made.
Notice: traditional eye needles are made using pieces of wire that have a point put on one end and the other end is stamped flat. The eye hole is also stamped (or punched out).
Spiral Eye Needles are not made the same way.
Spiral Eye Needles have a patented slot and channel that go into the eye. They also have a shaft that expands as it gets to the eye. This helps the material pass over the opening without going into the slot. Since the needle shaft is not an equal diameter the eye cannot be stamped.
What are the differences?
Pictured below are Spiral Eye Side Threading Needles. The unique geometry cannot be made by simply stamping an eye in the end. And the patented slot and channel that goes into the eye is a multi-step process. It takes a very specific geometry to make it work. Because I wanted to fix everything that was wrong with traditional needles, I also make them out of stainless steel so they will never rust. In America. By a small family run business.
That slot allows you to put thread into the hole you cannot see!
Why so many types of needles?
Spiral Eye Needles, like traditional needles, come in a variety sizes, diameters, and points. Each needle has its own purpose and it falls into categories such as Sharps, Chenilles, Tapestry, and Specialty.