I ordered this mini rotor a few months ago. Works great for my needs and holds a charge for a long time. There are many of them to choose from and I have returned a few. I am very happy with it. I work with epoxy so I use it for sanding, drilling, fine carving and polishing. I also bought 1 inch sandpaper discs to use with it. The whole bag is full, 314 pieces. Very fast shipping and works great for me.