Williams Combination Wrench, Series: SUPERCOMBO SUPERTORQUE, Measurement System: Metric, 18 mm Wrench Opening, 12 Points, 10-17/32 in Overall Length, 1-17/32 in Open End Width, 5/16 in Open End Thickness, 1-1/16 in Box End Width, 15/32 in Box End Thickness, Polished Chrome