Blackhawk™ by Proto® Combination Wrench, Measurement System: Imperial, Spline Wrench, 1-1/2 in Wrench Opening, 12 Points, 20-7/16 in Overall Length, 15 deg Offset, 2-3/16 in Open End Width, 13/16 in Open End Thickness, 3-1/16 in Box End Width, 5/8 in Box End Thickness, 15 deg Head, ASME B107.100 Specifications Met, Offset Handle, Steel, Satin