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-36 Heavy-Duty Chain Wrench

Size: 900mm (36in).
Rated Pipe Capacity: 110mm (4.1/2in).
Actual O.D. Capacity: 185mm (7.1/2in).
Chain Length: 725mm (29in).
Weight: 7.1kg.

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.