Schmetz needles are available in Standard or Large Eyes and Ballpoint or Sharp tips. Standard needles have thicker side eye walls that help reduce needle deflection. The longer tip to eye length helps pierce the material a greater distance.
The new Schmetz Large Eye FHS needles are designed for use with heavier weight threads such as Supertwist and Burmilana. They do not require you to adjust the timing on your machine. The Serv 6 needles are designed for work on stretch materials.