This is a vintage 4-piece set of open-end wrenches made by Armstrong between 1947 and 1970. The wrenches are made of Armaloy metal and have a chrome plating finish with a polished face. The set includes models 1033C, 1731A, 1727, and 1025, with sizes ranging from 1/2 x 19/32 to 15/16 x 1. The wrenches feature the "Strong Arm" logo and were manufactured in the United States.