Set of three (3) replacement Heavy Duty Rotary Brand blades that fit several Gravely Models. These blades are 24-1/2" long by 2-1/2" wide with a 5/8" center hole and 0.2400" thick. Requires (3) for 72" Cut Gravely. These are Heavier material than standard blades at 0.240" versus 0.204" Blade specifications as follows: Overall Length: 24-1/2" Width: 2-1/2" Thickness: 0.2400" Mounting Hole: 5/8" Fits Models: 44444 72" PM400, 47687 60" PM Series, 47687 60" PM Series, 47688 50", 47688 50" PM Series, 47688 50" PM Series, 47689 72" PM Series, 50465 72" PM400, 785067 50" (Riding), 785067 50" (Walk-Behind), 785067 50" PM Series, 787054 60" PM Series, 787054 60" PM Series.