Gator Mulching Blades that fit a John Deere 60" deck. Gator Blades feature teeth on the back side of the blade. These teeth do not cut the grass a second time, they redirect the airflow under the deck to bring the grass clippings back towards the center of the blade to be cut again. This results in shorter clippings and less windrowing (Piling up of grass) as it comes out of the deck. Another nice feature about the Gator blades is they have less vacuum that regular mower blades. This will allow you to mow over some rocks and sticks without picking them up and launching them as far as the regular blades do. This set of blades will fit the following tractors with 60" Decks 425,445,455 420,430 with new style mower decks above 525,000 serial number on the deck. F910,F911,F912,F915,F925,F930,F932,F935,F1145 Fromt Mount Mowers 650,750 Compact Utility Tractors with 160 60" Mid Mount Mower 655,755,855,955 Compact Utility Tractors 670,770,790 Compact Utility Tractors 755,855,955 Mid Mount 60" Mower 755,855,955 3 PT Rear Discharge Mower 4100,4200,4300,4400,4500,4600,4700 261 3 Pt Rear Hitch Mower