Pipe Wrench
Also known as
Stillson Wrench, Monkey Wrench (colloquial)
Used for
Gripping and turning round pipe and pipe fittings without crushing them — used on pipe-and-drape hardware, plumbing runs for effects, and any round stock that a standard wrench can't bite.
Trade note
Also called a Stillson wrench after Daniel Stillson, who patented the design in 1869. The serrated, self-tightening jaw digs into the pipe surface as torque is applied — it will mar softer or finished pipe, so it's avoided on anything meant to stay presentable.
Direct answer
Pipe Wrench is used for gripping and turning round pipe and pipe fittings without crushing them — used on pipe-and-drape hardware, plumbing runs for effects, and any round stock that a standard wrench can't bite. It is also known as Stillson Wrench, Monkey Wrench (colloquial). Trade note: Also called a Stillson wrench after Daniel Stillson, who patented the design in 1869. The serrated, self-tightening jaw digs into the pipe surface as torque is applied — it will mar softer or finished pipe, so it's avoided on anything meant to stay presentable.
Reviewed