Carbide Burrs Set 10pcs Double Cut Solid Carbide Rotary Burr Set 1/4" Shank Die Grinder Bits for Steel,Metal Carving, Polishing,Engraving,Drilling

Just as good as anything, you could buy from snap on for more than 10 times as much. Absolutely outstanding. They have been holding up very, very well, and I use them frequently as a professional mechanic.

Bought these to work on aluminum parts with. Quality appears good and the case is well made (especially compared to most that come with tools nowadays). I'll update the review if I find anything negative-- no update = all good.

Good selection of bits for general metal fabrication. I found the specific shape and size selection of bits in this set to be very useful. I ordered these in addition to a few that came with my astro die grinder set and the ones that were included in the set were nicer and came in a much better case. This one doesn't hold the bits very securely, the part that is supposed keep them from coming out inside the case can move letting most of the bits fall out while closed, which happened during shipping. Some double stick tape, glue or any other adhesive could prevent this. But the real bummer was when I opened the case up the lid would just fall back down. On mine the holder for second row of smaller bits wasn't attaching well to the piece for the bigger bits. I took the pieces off and there's a slot with a detent bump on the smaller row piece where it's supposed capture the little pin on the bigger row piece. They weren't going to line up so I just put a screw through the side of the case as shown in the picture and it works great now. I also used the vhb tape in the photo to secure the piece that holds the bits in. I almost threw the case away but it's actually a pretty nice, really rigid little box and so I made it work! Hope the bits don't need the same degree of babying to work well!

Me servido muchísimo

Used on different types of plastics,etals and woods. Very rpm sensitive so be careful not to burn them up. Otherwise the best for price!!!!

I needed to drill a 1/4" hole in hardened tool steel. The carbide drill bit I used left a hole that was just slightly undersized. The 1/4" round carbide bit quickly properly sized the hole in this very hard steel. I later used one of the cone-shaped bits to produce a nice chamfer along one edge of the steel. The bits left a very clean surface, with only minor polishing required afterwards.

Product is ok but much smaller than the ones I was replacing. Hard to judge the size of the burrs from picture.

I use them to clean up holes cut on the plasma table. They have lasted longer than any others I have tried.