NEW, Kutzall Extreme Flame Burr, 1/4" Shaft, Very Coarse (1/2" x 1"), 163012, Flowing shape, Produces concave cuts and V-cuts, Tip used for detailing or grooving, Head diameter: 1/2" x 1", Need to remove material in hurry? Still require precise control, there are no better tools for the job than Kutzall Extreme Burrs. The 1/4"-shaft Extreme Flame Burrs come equipped with a rugged, very coarse coating applied by fellow craftsmen. The aggressive, razor-sharp, tungsten-carbide teeth hog material away with unsurpassed efficiency, while also resisting loading. Spend more time carving and less time clearing your tool. Kutzall burrs are made in America. Diameter and head length dimensions on Kutzall burrs are base dimensions. The coatings add approximately .060" - .160".