My "tests" never put the knives under that much stress. On rare occasion I break a knife. But in prying and batonning and chopping very hard wood, INFI has been strong, as has SR77. It holds an edge better, too. Not that I am fanatical about edge retention. SR77 is good enough for me. The SR101 has outstanding edge retention, maybe as good as INFI. My tests are just user reviews and impressions. It works well or it doesn't.