carbon steel blade. Wood handle. Includes: FR725 #11 x 3/16 FR925 #11X x 5/16; FR926 #11 x 3/8 and FR927 #11 x 1/2. Four piece set. These very deep gouges are designed with a parabolic curve. They are designed to be rolled up to 90 degrees and change shape from a deep #11 to a smooth #3 in one continuous cut. The thumbnail grind keeps the corners from digging into the wood as the tool is rolled. Storage case.