Mars-Rock 10Pcs 1/8" Shank Carbide Burr Bits Compatible with Dremel Bits Metal Grinding Bits Wood Stone Carving Cutting Engraving Grinder Kit Attachment Rotary Tool Accessories Set Harder than Diamond

The assortment of bits work well to remove burs from drilled holes in metal. Performance and quality appear to be excellent so far and I can say they’re a great value for the price.

These work great for deburring metal

While I haven't yet used one of [these] tools, I wanted to make a general point or two. Some time ago, I destroyed three high-quality, expensive drill bits trying to drill out a screw shaft. Having used a drill & other tools all my life, I felt I knew what I was doing. So I destroyed the bits. But I knew what I was doing and it was time to buy new ones anyway. While perusing Amazon for replacements, I discovered something. I likely, needlessly destroyed my drill bits. But I knew what I was doing, I thought. High power, high-speed, high-quality. What's not to like? But I knew what I was doing ... and all the while I was ruining my bits. I needlessly destroyed my bits because I didn't use a good cutting fluid. Never heard of it. Been drilling for decades. But never heard of it. So I went out and bought "Rapid Tap Heavy Duty Cutting Fluid 4 Ounce" (Amazon) and found myself drilling out another broken screw head (shaft). But this time, I used the cutting fluid. I slowed down the rotational speed and kept fluid on the drill bit, down to the point. Result: Drilled out the screw shaft with one bit, in (a lot) faster time. And even better, the drill bit I used was as sharp when I was done as it was when I started. And it was the same type screw shaft as before; same brand. So when I read complaints from folks that talk about chipping, breaking or dulling without getting the work done, I would as them .. "Did you slow down the rotational speed"? .... "Did you use any cutting oil"? Likely the answer was "no". They used high power, high speed and no fluid. What killed the cutting tool was high heat and the oil disperses heat and lubricates the cut. Since then I've used cutting fluid on an inexpensive Dremel deburring bit at low speed on metal. The tool did its job with no chipping of the blade or dullness to the cutting edges. So I would conclude with ... "When you're sure you know, think again. Maybe there's something you don't know". But at the end of the day, don't speak poorly of a tool's performance if you didn't meet it halfway with improved knowledge and better technique.

Needed this to complete a job, and I honestly wasn't expecting these to last past the end of the day. Pleasantly surprised at the quality and durability. The price was great and the assortment was perfect. Looks like they will be used for future metal working projects. These are a great addition to my tool box and would be for you as well.

These bits have been the answer to my husband's dream! Great quality -- they're just what he needed.

Solid product

Smoking good deal for the money. Works well for carving letters into my DYI foam tombstones

Great for heavy grinding.

Excellent bits. Super good price. Nice little case to keep them in. These ger my vote. You can’t go wrong with these.

Good product to save time when shaping a wood carving or any other project where you need to shape a piece of wood.

Only downside is once you get to some harder metals such as bolts they slow down

Used this to enlarge a metal hole in some plates - worked very well do wear on the bits from short term use. Good product

good and sharp carbide burr set works great