Contact with a rock? No. They went into my bino harness after using it once in the field, then into a new SG harness, and when I pulled them out this season to go over gear, it had snapped while in the harness while not being used.
They said it rarely breaks and they sent me a new strap. However having had this experience, I can’t justify the sparrow being the only way I attach my binos to my tripod, if it breaks again, Im screwed. I ended up attaching an aziak instead.