Gallagher's Rapid Wire Tighteners are strong enough to put permanent strain on your fencing wire. They work with high-tensile, barbed, and woven wire types. They easily hook onto wire and are self-ratcheting. For even greater ease of use, they are compatible with permanent wheel tighteners like Gallagher's G644004 and G645004 models. | Gallagher Rapid Wire Tightener | Size 5 Pack