Brush cutter heads for a string trimmer

I've an Echo SRM-200 rigid shaft trimmer from the late '70s. All of 22 cc. I like how it works with 10" 80-tooth saw blade in the bigger, woody stuff. 10" 8-tooth "slasher" blade works great with smaller, weedy stuff. I've tried some of the plastic blades- I'll stick to the steel, thanks.

 

I've had/have a couple whackers with the 8 tooth metal blades. They have worked well on the multiflora rose vines and whatever weeds that happen to be near by.