The RIDGID 18 In. Aluminum Pipe Wrench fits Up To 2-1/2 In. Pipe. It is nearly 40% lighter than comparable cast-iron models of the same size. The jaws and all other parts are identical to RIDGID Heavy-Duty Wrenches. 

The RIDGID Aluminum Wrench is 30 percent lighter than the RIDGID heavy-duty wrenches. The jaws & all other parts are identical to RIDGID heavy-duty.