so what happens if I accidentally drop a quick drop Rock so there is this theory that if I get unlucky a micro crack might form inside the Carabiner that would be invisible to outside inspection and with repeat at loading this micro crack could grow and eventually however there has been many debates whether this micr fracture theory is correct or not so to settle the matter I visited three different companies for this video I got access to a very Advanced testing equipment even looked inside the carabiners and had a conversation with metallics engineer from mammut that's the lowest one we had so far so maybe it will get interesting maybe it will get interesting he said