The AM130172 mower blade kit is a precision-manufactured replacement part that directly replaces AM128013 and AM126023, featuring a direct-fit design that enables seamless installation without modifications for a wide range of outdoor power equipment models with 38, 42, 46, 48 and 54 inch convertible or mulching cutting decks. Constructed with premium heavy-duty steel material and precision-sharpened cutting edges, this blade kit delivers superior clean and even grass cutting performance, effectively eliminating clumping and stragglers while enhancing grass clipping evacuation for efficient bagging, side discharge or mulching functions to maintain a neat lawn appearance. It is engineered with a thickened blade core for enhanced structural strength and impact resistance, capable of withstanding contact with rocks, debris and uneven terrain to prevent bending, dulling and premature wear during frequent use. The durable anti-rust coated finish protects against outdoor moisture, grass clippings and debris buildup for long-lasting sharpness and reliable performance, and the exact dimensional matching ensures a tight secure fit with all compatible cutting deck spindle assemblies to avoid wobble, vibration and blade slippage during operation. Built to meet strict fit and cutting performance standards for outdoor power equipment blade assemblies, it is recommended to refer to the original equipment owner's manual to confirm proper fit and installation guidelines for your specific machine, including blade orientation and torque settings for safe and optimal use.