3 divided by 8 is the wrench needed When applying torque
When applying torque to turn or prevent the turning of objects—typically rotational fasteners like nuts and bolts—a wrench or spanner is employed to offer grip and mechanical advantage. The common term is "spanner" in the UK, Ireland, Australia, and New Zealand. The two most popular shapes are ring spanner and open-ended spanner. The word "wrench" is typically used to refer to instruments that turn non-fastening objects (such as tap wrenches and pipe wrenches) or it may be used to refer to a monkey wrench, which is an adjustable pipe wrench.
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