Review on High-Performance Carbide Tungsten Flutes Milling Straight: Precision Cutting Tool for Superior Results by Erik Sanders

So far I've drilled a 1" pocket 1" deep in mild steel with a 10mm end mill with no problem. Run at 2500 RPM at 5.5 inches per minute with a depth of .1875 inches per pass and a 20 degree incline at 5.5 inches per minute. As a CNC hobbyist, I make my fair share of gcode errors, it's a lot nicer to rip down a $35 set than a $100 bit. I will continue to buy them here as long as the price stays the same.