Simple. The dream turns. Mine might be weird, but it's surprisingly well focused. Accuracy is easy. I have ordered additional bits of different sizes and can recommend them. From the first battery I worked at least three hours, and from the second I have not started yet. I just can't express how grateful I am to have something so small and handy that makes it easier to remove a standard rotary tool from its fragile plastic casing, untangle the cord and gain access to an outlet. it doesn't melt much, just cuts. Yes. A few years have passed. I still use it. upside down and side to side. I use the switch quite a bit and it's still good. I don't know, maybe order 3 and send back 2 that don't work? my excellent.