So long as you know their limits and you don't abuse them, the 58mm scissors are absolutely beastly. They'll cut 550 paracord like a champ, and they'll trim your fingernails like a boss. Don't cut thick rigid stuff with them such as zip ties, cardbboard, or thickly folded/layered paper. They'll do it, but you'll beat them up in the process. Don't beat on your SAK, jack. 