A long time ago, I tried the Dremel. I admit I didn't stick with it very long.
I had two problems.
First of all, the dogs seemed to hate the whine of the Dremel. They were always trying to pull away as soon as the noise began. Maybe I could have somehow acclimated them to that but..
...the second problem was that the trimming seemed to generate a lot of heat at the nail. They didn't seem to like that either. That was probably my fault as back then there wasn't much guidance on it. I see now they say just a quick touch on each nail as you rotate around the particular foot until you get them all where you want them. That would avoid the heat issue I had.
I still have a Dremel type rotary. i could give that a try.
But truly, all four of my Labs will lay still and let me clip nails. They get treats afterwards. It's kind of funny; I put a blanket down and call them onto the blanket one at a time to lay down. Recently they have started trying beat each other into position before I even call one. I guess they are really into the treating.
My two old hand clippers are just worn out and I don't see that brand on Amazon now. That's why I asked.
Thanks for reminding me of the Dremel. I might give that a try now that I'm better informed on how to do it.