Oct 13, 2014 - How to carve rocks with a Dremel. Make rock pendants and add saying to rocks for home and garden decor. Designed to be used with Dremel rotary tools, Dremel Accessory Kits include a variety of accessories for shaping, cutting, grinding, polishing, sanding, and cleaning a range of materials. Use them on EVA foam, wood, metal, plastic, stone, and more. Every set also includes a reusable storage case that can stand upright or hang on the wall. A larger assortment of bits is not necessarily better from an economic standpoint, but it does reduce the need to seek out specialized parts later. Cost. Dremel rotary tool kits start out around $50. For that price, you’re likely to get a two-speed tool, with few or no attachments in the kit.