The concept of the original Dremel Moto-Tool was to rotate a bit at high speed; the bit being held in a collet. Variable-speed versions may cover a range of 3,000–37,000 RPM. The Dremel concept relies on high speed as opposed to torque unlike a conventional power drill, for example. By inserting an appropriate bit (or burr) the tool can perform drilling, grinding, sharpening, cutting, cleaning, polishing, sanding, routing, carving, and engraving. Both battery-powered and corded models are available. (Early cordless models were marketed as the Dremel Freewheeler.) Dremel options include a miniature planer attachment and a saber saw attachment that lets the tool act much like a small reciprocating saw.
Other Dremel rotary tools include a cordless pumpkin carving tool, a cordless pet nail grooming tool, and a cordless golf cleaning tool.