A Quick Threading Sewing Machine Needle with 4 Single and 1 Twin configuration is a specialized sewing machine accessory designed for efficient and convenient threading, particularly in multi-needle or industrial sewing machines.

Here's how it works:

1. 4 Single Needles: The Quick Threading Needle has four individual single needles. These needles are used for regular stitching tasks.

2. 1 Twin Needle: In addition to the four single needles, this configuration includes one twin needle. A twin needle is two needles positioned closely together, typically with a specific distance between them.

The main advantage of this configuration is that it allows you to thread multiple needles simultaneously, which can save a significant amount of time when working with multi-needle machines. It's especially valuable in industrial sewing settings where efficiency and productivity are crucial.

When you need to change threads or adjust the needles, the Quick Threading Needle simplifies the process. This reduces the time spent threading and increases overall efficiency, making it an essential tool for those working with multi-needle sewing machines.