Not sure what grade bolts come on the Cat 2 version, but I totally agree with the complaints about the low grade bolts on the Cat 1 version.
When I installed mine last year,, I swapped out ALL of the bolts ( except the "U" bolts ) with TSC Grade 8 bolts,,,
I did the swap for two reasons,
1) the bolts that came with it were "low grade"
2) I used bolts that were as close as possible to "ideal" length,,,
The included bolts are the wrong length, to allow the bolts to be more universal,,
the bolts I selected were specific to my tractor 3 point arm dimensions,,,
The Pat's adapter is a
GREAT hook for transporting a chain,, also !! :thumbsup: