A-P66945-AI Knife, Flail Mower (Smooth Cut)One New Aftermarket Replacement Smooth Cut Cup Knife Fits John Deere Flail Mowers This smooth cut cup knife is a direct replacement for flail mower cutting knives used on Fits John Deere (Fits JD) 25, 25A, 360, 370, and 390 flail mowers. The cup style blade mounts via a D ring hanger assembly and delivers a clean, smooth cut across grass and light vegetation. Also interchanges with Dandl, Rears, Vrisimo (Mighty Max), Rhino, and Befco flail mowers