Set of three (3) replacement high lift Copperhead Brand, USA made blades that fit 60" Cut Exmark mowers with 5/8'' Blade Arbors. These mulching blades are 20-1/2" long by 2-1/2" wide with a 5/8"" center hole and 0.204" thick. Three required for a 60" cut mower deck. Blade specifications as follows: Overall Length: 20-1/2" Width: 2-1/2" Thickness: 0.2040 Mounting Hole: 5/8" Round Center Hole Note: The mowers listed for fitment, have used both 5/8'' round and 15/16'' round Arbors, Please check your arbor size before purchasing these blades. These blades will not fit mowers with 15/16'' arbors.