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
Adler 167
Artisan 518
Artisan 2220M/B
Artisan 2240M/B
Consew 272
Juki LH512
Phaff 138, 238
Phaff 145
Phaff 545 (6-01 CLMN & H2)
Singer 107
Singer 111-W100
Singer 167
Singer 20U
Sailrite SR200
Sailrite SR200 Long Arm