JET 709163 Mini Lathe Turning Set, 5-Piece Chisels hold an edge six times longer than regular carbon steel chisels Constructed using M2 High speed steel for razor-sharp cutting Tempered to Rockwell hardness 62/64 for razor-sharp cutting Ergonomically designed rosewood handles with heavy-duty solid brass ferrules 3-3/4-inch high-speed steel blades