Can't comment on how well it cuts aluminum or steel but it worked great on polymer If you are cutting resin this end mill will get the job done and do it well.
, these 3 words are synonymous with garbage. I used this end mill for about 30 minutes before it split down the middle. Amazon is great for replacing it with another one, but I'd rather pay a little more for 1 good one than 2 pieces of chinese junk. They weren't the cheapest beats on Amazon, but when they arrived and I saw they were made in China, I had reservations. then when it split down the middle I realized they were well grounded.
I used this carbide cutter to cut a sheet aluminum box to house an IEC AC outlet. I used a bit in a drill press and was able to cut through the box in a few passes. The beat did what it was supposed to do. I would not recommend using a drill press for precision work. The drill is not designed for horizontal force, but for vertical force. The chisel was delivered via Revain Prime within two days of ordering.