Drillpro 8 Pcs Double Cut Carbide Rotary Burr Set 6mm (0.24 inch) Shank File Power Tools Double Cut

The burrs seem sharp, but the shank measures 6mm on the dot. .236", NOT .250! Though I received a bit of a refund from the seller, until the description says 6mm, not 6.35, I'm leaving this at 3 stars. Once I have a 6mm collet for my die grinder and get to use these and the description is fixed, I'll leave a more viable review and star rating. (Hopefully higher stars!)UPDATE: I've bumped the rating to 4 stars. The seller has stated the shank size (thank you) and these burrs cut really well. I've basically kept the cone-shaped burr in my grinder and use it mostly on aluminum, but have done some steel and plastics with no dulling at all. I'm glad I got these, they are worth the purchase, but only if you're prepared to use 6mm, not 1/4" shanks. (I made a sleeve on my lathe for a ID of 6mm and OD of 1/4". It works well enough.)

Very nice burrs. Very aggressive. They would have five stars if they did not break easily. I have broken two of them so far. And when they break, it is like the teeth are an outer shell and they break off in sections. Not just one tooth, but about one third of the outer shell breaks away. They work great up to the point of breakage.I would probably buy more as they are affordable,

DID NOT COME WITH CASE SHOWN IN LISTING. Each bit came in an individual lipstick tube type thing inside a cardboard box. Not the worst but I chose this set based on the hard case. They seem sharp and have a good weight to them. Will probably work for what I need but I think I will spend the money on a couple individual top notch grade burrs that I use the most. Made in China but what isn’t? All in all, a minor disappointment but they’ll be in my tool box.

Surprisingly good quality and performance. Used with a corded drill to port match an aluminum intake manifold to a throttle body (before and after pics), as well as shaping aluminum channels on an engine block. Works well, no complaints about the bits. The case is fairly cheap and opens to the right instead of the left like most other US based tool cases, but just a quirk, not an issue. Works as needed, would buy again.

I'm giving them three stars for now. So far they cut well, but I'll see how they hold up for awhile.

Looked great, but after that the review turns too poo, the shank is NOT .250 on any of the bits. All the shanks were .234 which would not lock tight in my collet. QA dropped the ball and I wished I could give less than a star.

Too small for all my die grinders that use a 1/4" (0.25") shank bit.These only measure about .20"

Purchased these these bits to finish up port matching an aluminum intake manifold. Kept them lubricated with WD40 to keep them from clogging up. These worked perfectly.