This product is a nice upgrade from my previous electric grinder. It’s a feather weight with enough power to remove material for my kind of work.
The bit that comes with the grinding pen leaves a surface finish equivalent to 400-600 grit sanding paper.
It fits nicely in my hands and handles a lot like a pen, my old electric grinder was comparatively bulky and unwieldy, with a cable that snagged on everything on my table..
TLDR: One less barrier to overcome and keep me at my bench!