Vintage Hex Key Set Allen Wrenches With Holder Tools Phoenix Gage Co NY USA

Vintage Hex Key Set Allen Wrenches With Holder Tools 
Stamped Pat. Pend. 
Phoenix Gage Co. NY USA
Includes; 11 Wrenches & 1 Holder. To be honest I don't know if these are all the original wrenches or if some have been replaced. 
Condition; Vintage; These do have some rust and pitting. Please see all pictures before bidding. 
Hex keys, also commonly known as Allen wrenches. 
Purpose:
These L-shaped tools are designed to tighten or loosen fasteners (screws or bolts) that have internal hexagonal recesses in their heads. 
Construction:
They are typically made from a single piece of hexagonal steel rod, bent at a right angle, with blunt ends that fit snugly into the corresponding hexagonal sockets. 
Versatility:
Hex keys are widely used in various applications, including furniture assembly, bicycle repairs, and working with small engines and electronic devices. 
Sets:
They are commonly sold in sets containing multiple sizes to accommodate different fastener dimensions, as seen in the image.