Review on Kutzall Original Cylinder Rotary Burr, 1⁄8" Shaft, Fine - Woodworking Attachment For Dremel, Foredom, DeWalt, Milwaukee. Abrasive Tungsten Carbide, 1⁄4" (6.3Mm) Dia. X 1⁄2" (12.7Mm) Length, C-14-EG by Don Merritt

I bought a few other bits from this company, and they’ve all been great. This is the only one where I have ever questioned the durability. I think its because it’s a longer piece and easier to bend if you put too much pressure on it (which heavy pressure is already a no no with the Rotary tools). Use it appropriately and you shouldn’t have a problem. I do think I overpaid a bit. However it’s better to overpay for a tool that works than underpay for a tool that doesn’t.