Zenith sells chipper knives at a price which cannot be beat. However, every product I have bought from them has been very very low quality. The chipper knives I bought (for example) lasted a very short time. (they are made in Vietnam, prob. from old Buicks or some other American car or product.) They where crap and required more sharpening than any other North American sourced chipper knife that I have ever bought!Zenith Cutter also sells them at great prices.