These are very high quality needles, i.e., without burrs which can cause the spearing of thread. These industrial needles have shanks that are completely round (home needles have one flat side).
These needles fit the following sewing machines: Adler 67
Phaff 138, 238
Phaff 545 (6-01 CLMN & H2)
Sailrite SR200 Long Arm