Torque wrench 4 to 1 what does this mean?

A torque wrench with a ratio of 4 to 1 means that for every four units of input force applied to the wrench, it produces one unit of output torque at the fastener. This ratio indicates the mechanical advantage provided by the wrench's design, allowing the user to apply a greater torque with less effort. Such a configuration is useful for achieving precise fastening without exerting excessive physical force.