Hi there! This is the same tool we use in our videos on our YouTube Channel - THE JEWELLERY WORKSHOP. 

This tool is great for making designs onto precious metals such as silver and gold. The tool is simple to use. 

It is attached to your hand dremel machine. We use a Marathon hand machine which you can find on google or amazon. 

• Shaft Diameter = 2.35mm

Please make sure your this item is compatible with your hand machine before buying. Any questions, please ask :)