Plumbers' wrenches look like spanners, but they have extra-long jaws good for gripping pipe fittings. Adjustable wrenches - ...

Historically, such a wrench would have smooth jaws that run perpendicular to the handle and adjusted vertically; a pipe wrench is similar but with serrated jaws; a crescent wrench has jaws running ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Whether pipe is being fed into the wellbore or it is being taken out, the iron roughneck uses a rotary table and torque wrench(es) to make up or break down pipe. What was once an extremely ...