The RIDGID Chain Wrenches has a sturdy, cast-iron housing with an I-beam handle and a double jaw that gives fast, ratchet-like action in either direction. It is ideal for use in close quarters.

The heavy-duty models have replaceable alloy steel jaws.

The light-duty model has a one-piece forged alloy steel handle and jaw. 

RIDGID C-18 Heavy-Duty Chain Wrench

Size: 450mm (18in).
Rated Pipe Capacity: 60mm (2.1/2in).
Actual O.D. Capacity: 125mm (5in).
Chain Length: 500mm (20.1/4in).
Weight: 2.7kg.

Rated Pipe Capacity is the nominal diameter that can be correctly tightened.
Actual O.D. Capacity is the actual O.D. that chain can accommodate.