Zenith knives in my chippers have held up just as well as vermeer or bandit knives, I can tell you that for a fact. If you have any problems with zenith knives, my advise to you is to stop throwing rakings in your chipper, cause you are sending rocks through them. I buy from factory direct and they are everyday hard working Americans like you and me. I purchase two sets of knives per year, and I work in Yonkers NY and the Bronx where hitting and chipping nails in the trees are a everyday occurance, but yet two sets of knives at a great price gets me through a entire year. I think one or two years ago one of the owners of Zenith was badly injured in a motor cycle accident, riding a Harley Davidson , not a Rice burner crotch rocket. The owners of Zenith are Americans all the way . They are very nice people and it makes me upset to hear rumers without a grain of truth puting them down. I have refered over 20 company's to them and never had any negative feedback from any of them. They even call me every year to inform me when they are running a sale so I can save more $. There products and customer service is A+++ , 5 stars all the way. Please get your facts straight before you bad talk a company. How would you like others to do that to you and your company. Think about it. These people are so nice that when I was informed about the guys injury, my family and myself prayed for them every Sunday at church. I consider people who go to great lengths to help me; friends, that is what the folks at zenith are to me friends. So please dont bad talk a fellow American company like Zenith. :angel: