Honestly, the small Vic pliers and wire-cutters, while produced with typical Swiss craftsmanship and precision, are a light- to medium-duty tool. I expect one could get through fence wire in a pinch with them, particularly if one were willing to sacrifice the tool, but I don't think they would be a good choice for regular cutting of fence wire. Also note that they are not hard wire cutters, nor do they have a hard wire notch.