The RIDGID 31635 Heel Jaw Assembly is designed for use with the #12 Heavy-Duty and Aluminum Straight Pipe Wrenches, #14 Heavy-Duty and Aluminum Straight Pipe Wrenches, #12 Heavy-Duty End Pipe Wrench, #14 Heavy-Duty and Aluminum End Pipe Wrenches, #14 Heavy-Duty and Aluminum Offset Wrenches, and Model S2 Compound Leverage Wrench.