What is it?
It is a Arduino bootloader flash tool. If you want to make a custom designed arduino board,you have to burn bootloader first then you can upload code to Arduino. You can also have a look Arduino as ISP and Arduino Bootloaders
Why did you make it?
Now I am using it to flash a product I am planning. It works well.
What makes it special?
2.54mm * 6P
This product includes 30cm test wire
size: 55 x 25 x 16 mm