Trilobite and small titanium knife mounted on my BC in easy reach. The knife has a blunt tip. I actually used it once to aid me when returning from a shore dive. A pretty nasty storm had appeared from nowhere after we had begun a night dive. Water was blown up on the reef and our exit was also the logical exit for the water. I'd kick till I needed a break then put the knife into the sand and with my other hand used my fingers like claws hanging on till I was ready to go again. The knife worked way better than my "claws". I don't think the trilobite (or shears) would have "cut it"