It's a lot of cash to drop on a tool. A Dremel is basically a small drilling tool that can run at very high RPM. It's like a hand drill but since it's smaller, you have better control and buy lots of attachments to suit your needs. I have one but rarely use it to modify action figures. If you need to widen the hole of a figure's head, it can be achieved by clapping down the head for security then CAREFULLY use a hand drill with the proper sized drill bit. Please oh please don't used a knife to widen a circular hole, that's butchery. I don't care if you are using an Exacto, that's not right. Dremels are like any other tool, you must have hours of practice before you get proficient. If you just want a wider hole, just use a drill bit. It depends on your skill level.