use in electronic multi-purpose sergers that do the overlock, cover, safety, and mock safety stitches. machines should specify the elx705 system. not suitable for use in normal home sewing and embroidery machines.
Here are some alternative phrasings for "flat shank":
1. Level shaft
2. Smooth rod
3. Even bar
4. Plain stem
5. Flat handle
6. Straight shank
7. Horizontal shaft
8. Uniform rod
Let me know if you need further modifications or more options!