Sat Jul 20th 2024 admin 2 of 22 Notched Disc Harrow Blade 1-1/2 Square 3 Gauge 6 MM Thick N223112 Disc harrow blades and plow discs have a variety of uses to include discing, hilling, plowing, and turning soil. Add to Favorite Sellers. 2 of 22″ Notched Disc Harrow Blade 1-1/2″ Square 3 Gauge 6 MM Thick.