Sanding Bits for Dremel Rotary Tool, Grinding Stone Sanding Drill Bits with 1/8" Shank, Aluminium Oxide Tough Enough to Metal Rust Removal/Smoothing/Sharpening, Different Shape Meet More Needs, 42Pcs

Great Product, affordable and precise.

I needed to wallow out a muzzle brake for a 50 Beowulf to fit over the barrel and this is hardened steel. The Machinist that did the first work said that it was really hard and then he wouldn't do any more, so I had to do it by hand and these really work well. They don't tear up real easy they're very good quality and they last a long time it's a good deal.

Not too unhappy with the purchase as the price was very good, but the bits just don't last too long for average grinding jobs. I do normal things like grinding away protruding finishing nails or small screws and a groove is quickly carved into the stone. The array of sizes and shapes is a good touch though!

ANYONE GIVING THIS PRODUCT 3,4 OR 5 STARTS IS A SHILL !!!!!Using the smaller diameter grinding wheel with my Dremel and guide to sharpen 3 mower blades, 2 edges each. One wheel disintegrated before the first edge was done and 2 more had the adhesive holding the wheel to the shaft come undone before the second edge was done. Never had that happen in years of using grinding wheels. 4 grinding wheels to sharpen one blade. Continuing with the 4th wheel and letting it cool frequently, made it thru the first edge on the second blade and wore too thin on the second edge & had to be replaced. 5th grinding wheel, even with frequent cooling had the adhesive give way on the 3rd blade first edge. 6th grinding wheel, frequent cooling just made it thru the 2nd edge but is wore too thin to use again. So, 6 grinding wheel, 2 worn out, 1 disintegrate and3 had the adhesive between the grinding wheel and the shaft fail. Along the way the shafts kept slipping in the holder and damaged the guide I was using. It will have to be replaced. I never had that happen before either AND it was always tightened hard. You be the judge if this is sufficient quality, I will be returning the lot and will buy official Dremel replacement in the future.

Very satisfied with durability. Purchased to grind down ends of 1” diameter stainless tractor pins that mushroomed out on ends after too much pounding with sledge hammer. These did the job on my ancient cordless dremmel, eventually wearing down to 1/3 original size without breaking or crumbling.

These are ok but they are all fine grit, i wish they included different grits with the different sizes as it is too fine for most of my projects

A real bargain. I split them between my upstairs and downstairs tools, there were plenty to go around. I mostly use the sanding drums, but some things need a more aggressive bit.

Good