Review on Enhanced Performance 8-Piece Double Carbide Rotary Burr Set for Strong Grip by Julian Locklear

It's hard to know which brand to buy. I picked them and found they work great. I paid for them, not freebies. They argued that the set would cost twice as much, but I don't know if they could have done better. I haven't used all setl. Used 3 or 4 sweat cleans and Fluxcor spray. I use them in my Metabo die grinder and it runs at full speed. If you try to use any brand of drill bits in a drill bit, you might think they're not that good. I think my grinder runs at 16000 rpm so 2500 rpm in a drill press is not enough to easily remove the material. There may be a bent mandrel. The burr that was soldered to the mandrel was cleaned well. Others I've seen at Revain have clearly visible solder joints. A box that closes and closes them would be nice, but they hold up pretty securely.