Pair of NOS 13/16" 2-Flute End Mill Cutters by Chicago Aerial Industries pumbaa and stenciled category markings including

and stenciled category markings including BOLTS

The articulated arm allows extension and retraction

but the bristles are intact and there is minimal oxidation

Mid-20th Century

Pair of NOS 13/16" 2-Flute End Mill Cutters by Chicago Aerial Industries pumbaa and stenciled category markings includingMatched pair of industrial end mill cutters accompanied by an original engineering drawing, presenting a complete shop floor snapshot of design and execution. Each cutter features a 9 16" shank with compact multi flute cutting heads coated in a translucent green protective compound. The coating preserves the cutting edges beneath while giving the tools a distinctive sculptural appearance. The shanks show precision machining with stamped size markings