10 Pieces Tungsten Carbide Double Cut Rotary Burr Set with 3 mm (1/8 Inch) Shank and 6 mm (1/4 Inch) Head Size

Good product

These are the greatest thing sense sliced bread. I used one today for over an hour shaping a large hole in some very thick hard steel and never fazed the bit. Now I do want to caution people about something with using these on steel, the metal slivers they create are the PERFECT size to prick into you skin and clothes! I started out just holding the work piece in my lap and after a few minutes I realized I had a problem! I shopped vac my clothes, used a razor blade to scrap the slivers out of my hands, then moved the work piece to the floor and held it with a leather high cuff welding glove. GREAT BITS! Just be very careful with the slivers of metal. I liked these so well that I ordered my neighbor a surprised set, they're supposed to arrive some time later today.

They work nice and without clogging on plastics and Fiber glass. Fast to cut into fiberglass panel and repairs. Just got to adjust your speed as it melts the fiberglass and clogs with resin. but comes off in pcs when cooled. For the price , its a great deal. Thanks

Tiny but works

"For the price I paid, the product is good enough."

Had to do some light / medium aluminum work on a scooter head to open up the ports. Not a bad value compared to higher end bits. Just take it slow on soft metal because the cutting edges fill with the metal. All in all it completed my project for a low cost.

I'll have to update this later on, because I can't yet speak to the durability or longevity of the product. That being said, these bits chew through bike frame steel like a shark chews through Australian beach bums! I used these bits (with the metal cutting discs) in my Dremel 4300 to remove a cable guide, a chain guard or kickstand mount, and those moronic mounting points people use to turn their beautiful gazelles into sad burros … and these bits work so well it took me more time to finish the job with a file. I may order a few additional sets for the future, in case of the inevitable deterioration in quality that seems to happen with Chinese products sold on Amazon.

I ordered these out of desperation while trying to get the hinge pins out of a GMT400 (99) Suburban. There's not much information on YouTube or Google about it. I tried multiple drill bits and specially made tools to try and get the pins out. Drill bits were semi successful but because of the hardness of the pins the bits got dull quickly and couldn't finish the job. I was rather skeptical because of the country of origin and cheap price but they chewed through the pin like it wasn't there. Only saw minor chipping of some of the burrs and even after snagging a few times these held up and finished the job.

Took more than a month to receive them but they work good.