Set of 10 high speed steel lathe tool bits, each measuring 8mm by 8mm by 200mm with hardness rated HRC 60-62. These rectangular fly cutter blanks work exceptionally well on mild steel, alloys, and tool steel. Common applications include lathes, milling machine fly cutters, and metal shapers. The parallel style cutter provides a continuous cutting edge throughout the length of each tool bit. Also suitable for turning, parting, engraving, and drilling operations.