The John Deere 42 in. Mower Blades (2-Pack) help provide a better lift of grass for a consistent cut for your lawn. These heavy duty blades are made of alloy steel and high carbon content for durability and a long-lasting cut.. For questions about service and repair, please call the John Deere Customer Contact Center at 800-537-8233 or reference the Service & Repair document. For a better lift of grass for a consistent cut. Made of alloy steel and high carbon content. Sharp cutting edge for a long lasting quality cut. Fits models D100, D105, D110, D120, D125, D130, LA105, LA115, LA125, LA135, LA100, LA110, LA120, Z225, Z235. Star-lock blade/spindle mounting system. Blade Length (in.): 21.417 in