A double open-end spanner, also known as an open-ended spanner or wrench, is a tool used for tightening or loosening nuts or bolts. It has two parallel jaws, one on either end, that are typically set at a fixed angle of 15 degrees to the tool’s axis.
Double open-end spanners come in a variety of sizes, with the jaws of each size being designed to fit a specific nut or bolt. They are commonly used in automotive and mechanical applications, as well as in construction, plumbing, and other industries.
One advantage of double open-end spanners is that they can be used in tight spaces where other tools may not fit. However, they can also be less precise than other types of wrenches, as they do not provide as much contact with the nut or bolt. It is important to choose the correct size of spanner for the job, as using an incorrectly sized spanner can damage the nut or bolt and may cause injury to the user.