Hi-Lift Blade Specially designed: to replace 7 pt. star center hole, Packaging Type: Branded label, Width: 2 3/4 ", Center Hole: 7 pt. star, Length: 17 ", Thickness: .164 ". Replaces Part Numbers: John Deere GY20852, John Deere GX21784, John Deere AM141035. Stens Part Number: 330-445