US Forge 00613 10-Way Cylinder Wrench Sizes include 7/16-Inch, 9/16-Inch, 1/2-Inch, 5/8-Inch, 11/16-Inch, 7/8-Inch, 1-Inch, 1-1/8-Inch, and 1/2-Inch and square socket Universal tank wrench fits all standard GA fittings used for oxy-acetylene welding Black oxide finish