Long handle open end wrench

A wrench with an open end fits around a fastener instead of over it, so you can slip it into an area where there isn't room for a socket. The most common shapes are called open-ended spanner and ring spanner. The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench—an adjustable pipe wrench. In North American English, wrench is the standard term.