Seco Threadmaster Taps are optimized for use in high production CNC machines but are great for small runs in the job shop environment. Designed specifically for steel, stainless steel, aluminum and cast iron materials, new Seco straight-flute, spiral helix, helix point and form-type taps provide optimum performance and affective chip control. Straight flute tap sizes range from M4 up to M42 with or without internal coolant; spiral helix types span from M1 up to M30 in size; helix point taps - for ISO P - are in sizes from M1 up to M30; and forming taps range in size from M1 to M48. Tap sizes of M4 and M5 are the smallest with internal-coolant capability, and all Seco's taps (specialty and general purpose) feature engineered coatings that enhance performance and extend tool life.