Back in the 50's "Yetter MFG" was the most popular after market "disc coulter". The work very good, replacing both the "coulter and jointer". The jointer and this disc coulter, throw a little girt over the grass or corn trash, to cover the trash better. Currently the Dearborn "10-1" is not as desirable as the latter "radix type shares" as the 10-1 "cast shares" are almost impossible to find.
BTDT Charles Krammin SW MI