Wolfride 4pcs Long Shank Tungsten Carbide Burr Set 6mm Shank Die Grinder Burr Set for Metal 6-Inch Length

Good overall, use then on my knife making projects..

The Steel used for the Shafts is Waay too soft. As soon as I turned on the Die Grinder, the Shaft bent 45 degrees just above the Collette. Just to make sure the one Cutter was not defective I tried a second one and the Same thing Happened. I then Cut off the 5.5” Shaft down to 2.25” and tried it again and at least the Shaft did not immediately Bend. Now to see if the Shaft is Strong enough to do the Light work on some Aluminum Without Bending so bad it becomes Useless.