20" Flat, 4 bolt coulter to fit Yetter, DMI, Blue Jet, and others. This blade is .197" thick, this is an extra heavy blade for longer wear. Made of Boron steel. Double punched for 4 hole, 5" bolt circle or 4 hole, 5-1/4" bolt circle. Fits fertilizer coulter on Blu-Jet, Clymer, Dalton, Case-IH, DMI, Progressive/Kongskilde, Yetter. Fits DMI 500, 1000 rippers.