Hammer eye drift. Used to enlarge the punched hole in a hammer eye. It’s forged from 4140 alloy . Used to shape the eye of a hammer once the eye has been opened with a punch. Aproximately 17" over all length . This is sized to cover the range from 1-4 pound hammers. They are available in “as forged” condition ( you Grind to a smooth finish ) for 50% of the finished ready to Go to work price.