This type of material used to be one of my favorites to use for my handmade pens.  But after a couple years it seemed the quality of the material decreased as the manufacturer began to grow with more orders for it.  Then eventually stopped making them all together. But prior to the changes these were great blanks to use and many pen makers had issues turning them but I loved them.

What is M3 metal composite?

M3 metal composite is a type of material that is made up of a metal matrix and a composite material. The metal matrix is typically made up of aluminum or magnesium, while the composite material can be made up of a variety of materials such as carbon fibers or ceramic particles. M3 metal composites are known for their high strength-to-weight ratio and are often used in aerospace and automotive applications.