SpeTool Single Flute (O Flute) Spiral End Mill Aluminum Cutter Carbide Router 1 inch Cutting Length with 1/4Inch Shank for Aluminum Acrylic PVC MDF Plastic

I used this to cut slots in an aluminum extrusion. It worked much better than Id expected.

Looks like a quality bit, but cut quality is terrible. Not sure if I just got a bad one, but it’s useless unless you want to sand forever.

This cutter has been great for me! I was able to do 14mm depth of cut, single pass, at 1500mm/min with no issues in HDPE. Aluminum I was able to cut 6mm depth of cut, single pass, at 400mm/min. I did get some chatter there, but a finish pass woulda fixed that. If I run a 2nd pass at 0.1mm depth, the finish is very reflective on aluminum, not using air-blast or coolant. Tool cutting ability all depends on how rigid your machine is. This cutter has no problems bogging down my dewalt router. Need a much more powerful spindle to truly push this cutter. Very impressed!