Picked up the MAXTRAX XTREME Gunmetal Grey boards for my 4WD and they feel seriously tough. The reinforced Nylon construction is heavy-duty, and the 88 replaceable anodized alloy teeth molded into the track give solid bite when you need traction. Sold as a pair, which is exactly what you want. The gunmetal grey finish looks great mounted on the rig too. Haven't buried them in deep mud yet, but build quality and design inspire confidence for real recovery situations.