Vintage Typewriter Function Key (black) Ring.   

Just choose the function of your choice Shift Lock, Margin Release, Tab, Lock, Question Mark, and Back Space.  

There is an additional $10.00 for each Back Space key ordered; they are very popular and hard to keep in stock.    

The silver tone ring is adjustable for all sizes.  

Please note that these are authentic typewriter keys from the early 1900's-1940. They are vintage and therefore have slight imperfections and wear.