I always purchase the craftman premium mulch blades for my lawn tractor. Having many acres of grass to mow, I occasionally encounter a rock or so. These blades stand up best over time.
Probably good, but don't fit my new mower. Same size cut and craftsman, but they changed from 5 to 6 point star mount. I didn't check it in December when it came, past return period. Been a while, but thing the site showed it would fit, wrong.
needed to replace the blades. these work well for mulching or bagging. good for another few years.