This is a vintage folding Uni-Key Allen Wrench made by Eklind T&M Co. of Chicago, model #91.
This tool is in pre-owned condition with wear from use, reflecting its age and history.
Compact and portable, it measures approximately 4.25 inches in height, 1 inch in length, and 1 inch in width, and has 9 different sizes of hex keys.
Weighing 0.46 pounds, this vintage key is a durable collectible or functional tool for your collection.