Armstrong 34-366 Adjustable Pin Spanner Wrench, 4-1/2-6-1/4-Inch Incorporates One Adjustable Hook Which is Designed to Adjust Threaded Collars, Locknuts, Rings, Packing Nuts, in Industrial Applications. Manufactured From High Alloy Steel Using the Most Up-To-Date Manufacturing Process and Heat Treat for Greater Strength and Durability Meets or Exceeds US Federal Spec. GGG-W-665B Made in the USA - Quality and Availability