Stillson

(redirected from Stillson wrenches)

Still·son

 (stĭl′sən)
A trademark for a monkey wrench having serrated jaws that tighten as pressure is applied to the handle.
References in periodicals archive ?
Pipe wrenches or Stillson wrenches are usually used to grasp pipes and other curved surfaces.
Twelve-inch and 18" Stillson wrenches are the most frequently used sizes.