Do you mean variety of actual Dremels or the multitude of Dremel lookalikes? If it's pure Dremels, for general work it's a choice between corded or cordless. My first experience of these tools was a corded one borrowed from a friend. Having used that a few times I decided to buy my own and went for a cordless. Despite Sunnybob's comment above, there is no reason why you shouldn't use it for intricate operations on wood. I have been using mine quite lot recently and have found the battery capacity a bit limiting so I've purchased an after-market one of twice the capacity.Seems to be a variety of Dremels, Which should I be looking at for DIY and woodworking.