Sunbelt B1PD5045 21-3/8 in. Predator Mulching Mower Blade for 42 in. Decks is designed to enhance your mowing experience with superior cutting efficiency and mulching capabilities. This 21-3/8" long blade fits 42" John Deere decks, including L100 and 100 series models. Crafted from patented Marbain® heat-treated steel, it exceptional hardness and resistance to bending and impact damage, ensuring the cutting edges stay sharper longer—approximately 25% to 40% harder than standard blades. The unique airflow tooth design not only strengthens the blade but also increases airflow, producing smaller clippings for a cleaner lawn. With dimensions of 21-3/8" length, 2-1/2" width, and .187" thickness, and an 11/16" diameter center hole, this toothed blade delivers reliable performance and durability. It is equivalent to John Deere GX20249, GX20433, GY20567, Oregon 92-676, and Rotary 10635 blades, making it a versatile option. Model Number: B1PD5045