Advantages of Spiral Mill-Thread Tools: The spiral designed tools enables a smooth cutting operation at a high feed rate and reduced machining time. The tools suit a wide rang of applications, from machining small components in small machining centers to heavy-duty applications in high power milling machines. Spiral fluted toolholders hold 1 to 9 inserts in a comparatively small cutting diameter. The unique clamping method enables optimal indexability. Spiral tools reduce vibration and chatter. High grade finish is achieved in all applications: threading, end milling roughing and finishing. Inserts are available in MT7 Sub-Micron Grade with Titanium Nitride multi-layer coating (ISO K10-K20). This is a general purpose grade, which can be used with all materials.