Replacement Gear - SINGER TINY SERGER TS380 PLUS - Overedging Sewing MachineThis gear is a replacement for the notorious cracked gear that fits on the motor pin of the Singer Tiny Serger.Simply open your machine, pull off the old cracked gear, apply a small amount of white lithium grease (sold separately) on the pin and center of the new gear, slide on the new gear, and it's fixed!Don't forget to put the machine back together!Note: These gears are mean to fit very tightly and may take some effort to put on, or a light tap from a rubber mallet or something similar. This is totally normal.Please contact us if you have an questions or difficulty installing. We will be happy to assist.Thank you for your business!