Aftermarket Replacement Set of three (3) Oregon G3 Gator Style blades that Are Compatible With 52" Simplicity mowers with 18" blades and 5/8" Center mounting holes, Equipped with X-Tended Cutting Length to improve cutting efficiency and have up to twice the cutting length. Great for Mulching. Replaces: Simplicity: 1756152AYP, 1756152SYP, 5101756S, 5101756SYP, 5103304SYP, A48185 Oregon- 96-344 Blade specifications as follows: Overall Length: 18" Width: 2-1/2" Thickness: 0.203 Mounting Hole: 5/8 Round Air Lift: 3/4" Aftermarket Replacement Set of three (3) Oregon G3 Gator Style blades that are compatible with 52" Simplicity mowers with 18" blades and 5/8" Center mounting holes, takes 3 for 52" cut . These blades are 18" long by 2-1/2" wide with a 5/8" center hole and 0.203" thick. Equipped with X-Tended Cutting Length to improve cutting efficiency and have up to twice the cutting length. Great for Mulching. Replaces: Simplicity: 1756152AYP, 1756152SYP, 5101756S, 5101756SYP, 5103304SYP, A48185 Oregon 96-344 Blade specifications as follows: Overall Length: 18" Width: 2-1/2" Thickness: 0.203 Mounting Hole: 5/8 Round Air Lift: 3/4" Note: These blades fit the models with a 5/8" center hole, newer models had a 15/16" center hole, please make sure your mower has the 5/8" center hole before ordering these blades If you are not sure if these will fit your mower just send me an email with your model number and I will be happy to confirm them for you!