I have a 13 year old 6’ Bush Hog Squealer it is quite a bush hog. It has a two part rubber clutch and a shear pin.
When we first bought the farm the prior owner said there was a deep well some place on the farm, could not remember where. I found it, it went between the 1” thick forks on the root rake, running along the ground, right into the bush hog, a 2” galvanized with a 1 1/4” inside that cut both pipes half way, completely through side to side, shut the tractor off. Not a chip, dent or bend. Dug around the well, cut the double pipes off with a cordless saws all, buried it up.
On natural stuff, it cuts and smashes up to 3” or so stuff just like a bush hog should. It also mows grass.
I would add a 1 1/2” angle iron reinforcement around the outer edge. So you do not need a handy stump to straighten the edge out on.