Armstrong 26-067 Full Polish Open End Wrench 1/2 x 9/16" Made in the USA Two Different Size Openings on Opposite Ends Provides Broader Coverage than a Combination Wrench Open Ends Are Offset 15 for Turning a Fastener in a 30 Arc Made From High Alloy Steel Using the Most Up To Date Process and Heat Treat for Greater Strength and Durability Meets or Exceeds ASME B107.6-1994 and US Federal Spec. GGG-W-636E