Stillson wrench

American  

[stil-suhn] / ˈstɪl sən /

Trademark.

1. a monkey wrench with a pivoted, adjustable jaw that grips pipes, bars, etc., more tightly when pressure is exerted on the handle.

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Stillson wrench British  

/ ˈstɪlsən /

noun

1. a large wrench having adjustable jaws that tighten as the pressure on the handle is increased

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Example Sentences

The fifth-grade daughter of a plumber might bring in “copper tubing, small Stillson wrench, solder,” for example.

From Slate • Jan. 28, 2021

For extractions they used a fearsome instrument called "the pelican," precursor of the Stillson wrench.

From Time Magazine Archive

A Stillson wrench has the serrated jaws and toggle action needed to grip pipe.

From Time Magazine Archive

He has huge, deeply calloused, plumber's hands, made to grasp a Stillson wrench or to bang a conference table.

From Time Magazine Archive

"See if there's a Stillson wrench in that locker," said Roy.

From Tom Slade at Temple Camp by Fitzhugh, Percy Keese