Due lame per pacciamatura 21-1/4" OEM John Deere M149422 per ponte 42"--Ottime-Usate
The center hole is the standard 7-point star style (11/16-13/16" dia.). At the center hole the blades are about 5/8" in height. They are about 7/8" in height at the topmost part of the ends opposite the cutting edge.