Cylinder burs (SA) have a straight, barrel-shaped body for general deburring and finishing of flat surfaces, interior contoured surfaces, and right-angle corners. They're often used as an alternative to a file to remove sharp edges, unwanted projections, and excess material from machined workpieces. Cutting edges are made from carbide, which is a hard material that resists wear and limits heat. Carbide burs attach to rotary power tools such as die grinders, high-speed engravers, and pendant drills.