Most of the lightweight ones are not going to cut barbed wire...that stuff is tough. You're gonna need one of the big ones...Surge, Wave, Core, Super. Frankly, if I were going to come up against barbed wire regularly, I'd take a full sized lineman's pliers or something. But I think the Surge, which is huge, (all above are Leatherman) would do the trick. It also has a file with a cutting edge so if you got into so seriously thick tough wire, you could cut it that way.