I bought a couple of additional tools for my Dremel (actually a Wen). One is the Dremel 561 Multipurpose Cutting Bit. I was hoping this would help when I need to cut a hole in a project box. It's a bit too aggressive for that, and you can't cut accurately to a line, at least on ABS, so I'm not sure I'll be making much use of it. The other is the Dremel 631 Brad Point Bits set. This is really nice - four very sharp drills, with brads (pointy bits) which helps center them when you are starting to drill.