I don't even want to give this thing a star. It's garbage. I bought it to do rough wood carving (I use a briar block). Let's start with the brass fastener (which goes into the chuck and holds the bit). It broke as soon as the circular cutter touched the wood. So maybe such a device is not intended for use on a tree? This broken piece makes the racket tip wobble. *imagine doing something with a wobbly tool). I mean so wobbly that when working it looks like 2 spikes instead of one. Really sucks because I've tried other bits and they just won't chew this wood. (By the way, I make a pipe and have used Dremel brand rotary tools for this purpose with no problem). The device switches off after approx. 45 seconds of operation. (It's not a print. I just held it up and turned it on.) It's cheap junk. I'm actually looking for a "Made in China/Korea" stamp. I ended up giving the piece of wood to my parrot and letting him gouge it out with his beak for a day, then came back with a regular razor blade and used his chew marks to shape the whistle. This rotary tool is cheap junk. Now about the seller: fast delivery, excellent packaging. Good seller but crappy tool. Oh yeah. one of the other routing bits rolled off the table. Guess what. tip broken off. Do not buy this item. Earn another $20 and buy a better tool. You only get what you pay for. I was stingy so I ended up with cheap junk. In no way the seller's fault. I only expected this tool to bite into wood since others mention it's used on glass and stone. Buyer Warning. It's garbage.