[quote author=mp link=board=5;threadid=12702;start=0#95012 date=1041141125]<br>I'm no expert, but I've read somewhere that Grade 8 is too brittle, and Grade 5 is just right for body mounts/lifts.<br>[/quote]Lets not get that one started! I have changed the bolts many times in my toe hooks to qualify for a run.Funny thing is I use 1/2 inch bolts and I think grad 3 would hold, but I have changed from 5 to 8 and back because some people are anal about bolts!