Tools DLC Series Carbide Square End Mill, Diamond-Like Coating, End Mill for Aluminum, Copper, Magnesium Alloys, High Silicon Aluminum, Composite Materials,3 Flute,3/8 Shank(.375(3/8)", 5pcs)

These endmills are incredibly well-made for the price. Each looks like an expensive jewelry piece and works just as well as it looks. DLC-coated bits have finally become affordable for hobbyists like myself, which I consider a major technological milestone. I don't think it is possible to find better bits of this type anywhere else at this price. Highly recommended.Update:I was overzealous with a feed rate so one of the bits broke at the shaft. There was about 5mm of the shaft left, so the remaining piece could still be secured in the chuck. I decided to do some test runs to see its capabilities, and here are a couple observations I'd like to share.First, don't use these bits as a conductive probe on Z axis for anodized aluminium or any other hard material. The tips of the flutes are so sharp and so microscopically thin that they are very likely to break off before electric contact with the workpiece is established. DLC coating might also play a role, impending conductivity. The endmill still cuts after that (and pretty nicely I might add), only the cuts are not as super clean as before. More than sufficient for roughing, but not for the finishing job.Second, I have yet to see it clogged by any material, even the softest, most gooey aluminium I could find in my workshop, and even on high RPM. I didn't use any coolant or lubricant in my test runs. The caking just doesn't build up no matter what, thanks to slippery coating. So I am starting to believe the RPM and feed rate could be increased at least twofold compared to regular carbide or even TiC/Ti-Al covered bits. Still more tests are needed to establish optimal cutting parameters, but the results are so far very promising.Overall, the more I'm using these bits the more I am impressed by them. A real hidden gem as far as I can tell.

These are so far the best bits I've used. I've only been "trying" to cnc for about 6months. I have been using these for about 2 weeks, still on my first bit, probably 20-30 hrs on it. Normally I would have broken all of them by now, ahhaha.

One of the weirdest things is that the flutes don’t appear to be 120 degrees from eachotherIt seems like it might be a variable flute endmill without advertising that it’s variable flute! and for this price?? i couldn’t believe itDecided to do a few quick profile cuts until i worked out feeds and speeds for this tool and wow, im impressedThe helix angle lets you get a nice engagement and that nice hum. I was pushing 13,000 rpm with 3,000 mm/min and it cut so nicelyThe DLC coating is great as well, this is a bargain for the value it brings!!

it has been used for more than a week ， the cutting is still smooth，good

These baby's are some of the best on Amazon. They never break even when pushing their limits, the coating makes them last a very long time. They are super sharp.I have bought many end mills and these have been the best so far. I will be using these in my production runs from now on.

Bought these DLC coated end mills for our frequent aluminum part runs. Have not yet taken the edge off of them after running them 4-5x longer than conventional carbide with ZrN or TiCN coatings. Looking for more great DLC tools from WEXWE, such as 90 degree drill/mills, drill bits, etc. I'm sure I will be just as pleased with them as I am with these!