This thread guard is what encases the tension discs on the tension unit. Be sure to watch the video, under the video tab, if you need to know how to put the tension unit together, or if you are unsure about what piece you need.
This thread guard is what encases the tension discs on the tension unit. Be sure to watch the video, under the video tab, if you need to know how to put the tension unit together, or if you are unsure about what piece you need.