The pictures should show what exactly it is. Check out the writing on it. The condition of the bit is very impressive. Looks like it was never used but sat in the box for like 50 years.
Rock Drill Bit or Machine Bit
-Estimated Delivery Cost lower 48 U.S. $13.99
-Rock Drill or to a very big Machinist drill machine
-Bid Increments $5.00
Availability: 1 in stock