1/8'' Micro Pneumatic Air Pencil Die Grinder Kit, Pencil Style 52000-70,000 RPM, 3mm 3.17mm & 2.38mm Capacity, Engraving Tool

Easy to use. Seems to be good quality. Wish the bits were better

Diamond tips aren’t up for the challenge of most crystals, rocks, or gemstones. I had a jasper freeform eat up a bit in 4 minutes. Don’t bother unless you plan to use it in wood or something soft.

Great for grinding stuff works great love it

This die grinder works well. Really spins fast.

I bought this one because my Foredom hand piece is a bit heavier tan this aluminum one and I need to help my hands a bit. Have not use it extensively, but my first impression is that it sounds good and looks well made. I will give it a try and see how it works in a long run. It comes ready to use. You just need to add oil to the included little plastic bottle.

The tool itself works great. The bits that come with it are absolutely worthless and I'm comparing thier uselessness to Harbor Freight generic. The arbor(s) do NOT fit a standard 1/8" bit. I tried to tap 2 in, it was a no go. I pulled the arbor from from my Dremel and it worked.

Well made good investment to your toolbox

Piece of junk...only lasted maybe 20 hours of use. Bearing were bad out of the box. Don't bother with this one