In this video you will see the restoration of a stillson or dog wrench also called a grifa wrench in Spain, it was rescued just before being thrown away due to the breakage of its lower tooth.
I tell you a little what it is for:
The Stillson wrench, pipe wrench, or wrench is an adjustable wrench used to tighten, loosen, or adjust parts that the wrench would not be capable of. Used to fit larger parts, requiring the application of considerable torque