Made with a blade of the highest quality steel. The 200 SERIES HEAVY GAUGE TOOLS are made from true tool steel. The blade is heat treated & tempered to produce a molecularly superior steel. In our 300 SERIES MEDIUM GAUGE TOOLS we use a high carbon steel that is hardened and tempered to withstand the abrasion from clay but tough enough to be impacted and not break. From the type of steel, to the treating process, right down to the blade angle, this tool was designed to hold an edge.