Just like any knife, the cutting edge can rust or wear over time and with heavy use. Sewists can always ask to have their blades sharpened, but after a blade is sharpened more than once the quality of your cut edge may suffer.
These blades differ from model to model, so make sure to check your machine’s model number and compare the fixture on your current blade.
Part number: 799 096 000
Made by Janome