Originally Posted by pee wee
if you have a Janome, use Schmetz needles -- If you use Singer needles, the threader won't work.
I have a Janome and use both Singer and Schmetz needles and it works fine (the second threader, anyway -- the first one I broke within the warranty period by lowering needle while threader was down. Learning it would cost $90 to do that again inspired me to read the instructions).