-APT5 For high-efficiency machining (HEM) in aluminum alloys.The APT5 is the POW•R•PATH tool that applies to aluminum alloys the same HEM tool paths that work very well in ferrous materials. Engineered with both a solid core for stability and chip evacuation space for high feed rates. The unique cutting edge design combinedwith 5 flutes and the extra-durable taC coating generates incredibly high metal removal rates.