Serging Simplified. Every project is easier with the right tools for the job and the AirThread 2000D provides all the tools you need to deliver professional quality finishing. With Janome's One-Push Air Threading System the tedious threading of upper and lower loopers is a thing of the past. The Built-in One-step Converter makes changing from 3-thread to 2-thread applications easier than ever. And with a built-in needle threader manually threading your serger needles becomes easier than ever.