Kit Includes: (1) High-Lift Blade replaces 72511-VE1-001, 72511-VE1-010, 72511-VE1-020, 72511-VG3-000 - Center to Center (Outside Holes): 3-15/32", Length: 20-15/16", Cut Direction: Right, Width: 2-1/4", Thickness: 0.1340", Diameter of Outside Holes: 13/32", C. H. Diameter: 0.8040" (1) Upper Blade replaces 72531-VE2-010, 72531-VE2-020, 72531-VH7-000 - Diameter of Outside Holes: 13/32", Width: 2-5/8", C. H. Diameter: 1-17/64", Center to Center (Outside Holes): 3-15/32", Thickness: 0.0950", Length: 20-3/4", Cut Direction: Right (1) Lower Blade replaces 72511-VE2-000, 72511-VG4-K00 - Length: 20-15/16", C. H. Diameter: 0.8300", Diameter of Outside Holes: 13/32", Thickness: 0.0950", Cut Direction: Right, Center to Center (Outside Holes): 3-15/32", Width: 2-1/4" Fits Models: HRB215, HRM215, HRS216, and HRT216; 21" Walk Behinds