Dremel is the lutherie standard if you want to use the myriad of accessory bases, etc. For just freehand grinding, my Black and Decker Wizard, not made anymore, does accept the Dremel universal drill type chuck. They are variable speed and last forever. I see them on eBay for less than $10.00 I also like my 1/4" chuck variable speed Goxawee grinders. Like a Dremel on steroids. On Amazon for less than a Dremel. I have a couple of the newer rechargeable Dremels too. Pretty good tools, despite being Dremels.