Any thoughts on why my sure-grip did this?

looked like mine after 3000 whole shots and donuts my pin came out got cut in 1/2 and oblonged the hole out and the shearpin took out everything ,looks like the ring gear got it too , check it good might save the ring and pinion , but the rest is smoked keep that 1 for parts for a minute some 1 might give you a break like I got on a new used 1