This blade/knife is a direct replacement for your Janome overlocker machine. This is used to trim the fabric whilst overlocking.
We strongly recommend replacing both the upper and lower blade at the same time to avoid premature wear.
This blade will fit the follwing Janome overlocking machines:
204D
DM234
634D
6234XL
504D
644D
8002D
8002DX
9102D
9200D
9300DX