Pro Parts Place 2 USA Predator Blades Compatible with John Deere UC22008 Compatible with John Deere Z335E Z335M Z345M Z345R 42" - Earthtec, M170642

• 42 in blades feature a unique steel that incorporates boron, carbon, manganese, and other materials that ensure its strength. The blades are heat treated with the patented and independently tested Marbain heat-treating process. This special process makes the blades 25% - 40% harder than standard lawnmower blades, making them the longest-lasting, safest, and most impact resistant lawnmower blades on the market. Replaces the following part numbers: for JOHN DEERE M170642 42" CUTS. Center Hole: 51/64" Width: 2-1/2" Length: 21.420" Thickness: .197" Fit for John Deere RIDING MOWER: X350 for John Deere RIDING MOWER: X354 for John Deere RIDING MOWER: X370 for John Deere ZERO-TURN: Z335M ZTRAK for John Deere ZERO-TURN: Z345M ZTRAK for John Deere ZERO-TURN: Z345R ZTRAK 2PCS meet your replacement needs, please check the model number and applicable brand when purchasing.