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The rotary tool rotates a bit at a high speed. The Dremel uses its speed as opposed to torque to get the job done. By inserting an appropriate bit (or burr) the tool can perform drilling, grinding, sharpening, cutting, cleaning, polishing, sanding, routing, carving, and engraving.
A scroll saw is a narrow-bladed stationary saw used for cutting fine details, decorative spirals, lines or patterns. The scroll saw is best used on thin materials and is good for prototyping.
A cordless drill is an electric drill which uses rechargeable batteries. These drills are available with similar features to an AC mains-powered drill. This driver drill has a clutch, also called a torque limiter, which aids in driving screws into various workpieces without damaging them. Drilling large diameter holes (typically 12–25 mm (0.5–1.0 in) or larger) may drain cordless drills quickly.