SpeTool5PCS O Flute (Single Flute) End Mill Set 1/4" Shank, Carbide Spiral Upcut Router Bit for CNC Router Milling Cutter

Used on polycarbonate and 6061 aluminum- nice clean cuts

I ran this faster and deeper than I thought I would be able to. Ramp into your material, and use a nice cutting/cooling fluid, and go for it. Nice bit, really.

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

I run lots of different bits and this brand is one I can for the most part count on as being a decent bit. Not the best but not the worst brand. I have had pretty good luck with the brand but have had a few that didn’t last very long or just not up for the job. They are not super expensive but not cheap ether. With so many choices I can usually count on them. If i am doing a big job or something that is really precise i don’t use them I will use a brand I trust a bit more. Not saying this is a bad brand.

Works with aluminum good

THEY HAVE A DEGREE ANGLED CUT, BUYER BEWAREThe router bits will cut material at small degree angle sloping upwards.

Only 1 cut so far but almost no cleanup after first cut

This endmill has the good shape that I like and I have bought them before and they worked well. However this batch melted down quick on the exact same feeds and speeds. I may have bought a bad batch but will not buy again.