The Channellock® BIGAZZ® straight jaw tongue and groove plier is as big as the job you need with a 5-1/2 in jaw capacity. Its 12 non-slip, undercut adjustment channels offer a versatile range of adjustments for virtually every field application. This plier is built to last with a PermaLock® fastener to eliminate nut and bolt failure, patented reinforcing edge to minimize stress breakage and laser heat treated teeth to provide a better, longer lasting grip. Pliers are made in USA and forged from high carbon steel that is specially coated for ultimate rust prevention.