Review on Niagara Cutter N88621 Finishing Diameter by Roger King

The worst end mill rattle I've ever seen. Suitable for roughing, but useless for finishing. I put in a .600 and hit a 2x3 pocket and it didn't break so that's good. But finishing the .005 around the 2500 inch circumference left a lot of vibration marks, which isn't great. I will not buy another end mill from this company.