Bits like the 9909 tungsten carbide cutter are good for shaping and smoothing exceptionally hard materials. The 191 high-speed cutter bit is ideal for cutting into wood, plastic or other relatively soft materials.
The 535 brass brush is softer than steel and ideal for polishing softer metals like gold. Dremel's 463 rubber polishing tapered point bit is used to remove scratch marks and burs from ferrous metals.
Bits like the 952 aluminum oxide grinding stone are employed for general grinding on metals, rust and welded joints. The 455 chainsaw sharpening stone is specially designed to quickly sharpen the blades on a chainsaw.
Dremel's 475 carbide sanding band is ideal for shaping flat or curved surfaces and sanding difficult to reach surfaces. The 430 1/4-inch sanding drum works well to sand and smooth woods and fiberglass.