SST18 Spin Steer Tractor John Deere lawn mower blades are manufactured with a combination of carbon and boron to provide hardness for a long life and sharp edge without breakage.

The best mulching blades for a 48 inch deck are those that are specifically ... Some popular options include the Toro Recycler, the John Deere Mulching Kit, and the Husqvarna 3-in-1 Blade.