This gouge is made with a special flute shape and has the end gound at the factory in a Side Grind, sometimes called a Celtic Grind. This grind allows for cutting all the way down to the bottom of a bowl while keeping the bevel rubbing. Made of M2 High Speed Steel. The handle length on the tool is 16" for good control. The tool is called a 1/2", but measures 5/8" in diameter.