a
trademark for a wrench with an adjustable L-shaped jaw that tightens as
pressure is applied to the
handle. It was originally designed in 1869 by
American inventor
Daniel Stillson (1830-1899). A wrench is a tool consisting of an adjustable gripping device (
similar to jaws with teeth) on a
handle. One uses it for such things as
holding and turning pipes or other round objects. Wrenches of various sizes and types are made under the Stillson
brand name, all with a
similar design.