The process is to make the nails first by using nail making machine, then polish the nails by using polish machine to get the finished nails, last, you can packed in carton or bags by hand. however, you can also draw the wire as you required by using wire drawing machine by yourself.
Usually the original wire diameter in the market is 6.5 mm or 5.5 mm, the function of the wire drawing machine is to draw the 6.5 mm wire to different diameter for making nails ,such as 3.4mm,2.8mm etc.
There are different model nail making machines designed for different size of nails .
for example,
3c is designed for 1-3 inch nails ,
4c is designed for 2-4 inch ,
5c is designed for 4-6 inch.
However, if your budget is limited, you can also use z94-5c to make 1-6" nails.
Here is a video link of nail making machine on youtube for your reference : https://youtu.be/05RAfHP9oSI