An adjustable set wrench includes a wrench handle; an adjustable wrench head provided on the wrench handle and having a stationary jaw, an adjustable jaw and a wrench gap between the stationary jaw and the adjustable jaw; at least one of a metric jaw adjustment scale having metric marking units and a standard jaw adjustment scale having standard marking units provided on the adjustable wrench head; and at least one of a metric jaw mark and a standard jaw mark provided on the adjustable jaw and registering with at least one of the metric marking units and the standard marking units.