Wolfride 4pcs Long Shank Tungsten Carbide Burr Set 6mm Shank Die Grinder Burr Set for Metal 6-Inch Length

exelente producto funcional al maximo, es de muy buena calidad, resolvio mi problema

Did.job

I’ve only used on porting mostly aluminum some steel 2strokes for a couple hours but they don’t seem to be wearing at all yet. They can be cut a little shorter or you can hold the shaft with your callus or greased fingers. It will kinda bite and chatter or skip if you don’t hold it well a little closer to the burr. Good value same as eBay

Good overall, use then on my knife making projects..

works great in a drill. when used in an electric die grinder, the lack in thickness allows flex and a lot of wobble in the bit. to cut down on wobble, a couple of inches will need to removed if prefer to use in die grinder.

They tend to wear down too quickly for being cobalt.

Broke with in 5 minutes of use. Was using to bore a nut bigger for a bearing driver ended up using a socket.

these are listed as use in die grinder,these will wobble and bend when grinder is turned on, I cut length down to 4 on a new one and it still was so out of balance it almost hurt me, needed to complete a task so ran in a 3000 rpm drill and was able to use it. I would caution you to not spin these very fast. you might get hit in the face.

using for boat fiberglass repair, and very satisfied so far.

Very well-made and strong stay sharp for a long time I used mine on cast-iron and they Are still sharp