n incredible amount of different types. However, in this article, we'll simplify things and go down to two basic ones - metl and Plexi.
For steel/aluminum engravings, I always use diamond bits since these give a great result and they are very durable. There are all kinds of different sizes but there are three basic bits that get you started in a good way.
When doing plexiglass engravings you can use the diamond bits, but I like to use a different kind of bit since I like to play around with diff