Best chipper knife manufacturers?

[TunaCat]

What is your favorite chipper knife manufacturer and why?

I have an old Gravely 495 chipper with 16” x 3 1/2” x 7/8”. So far I have found them @ Knife Source for $465 per.

I keep hearing that zenith cutters is bad. But they are cheaper.

Who do you use?

Who should I avoid?

 

[250R]

I've always used Screwmmeer knives for my 1800XL's. Made in Vietnam. I just purchased a set from Treestuff. Knifesource is the mfg. Made in USA. Lets see how they hold up. Significant price difference but if they dull quickly then there is no savings.

 

[blades]

I sharpen chipper knives commercially, When running them On grinder I see very little to any differance between brands.