The 98-097 mower blade is a precision-manufactured replacement part featuring a direct-fit design with an exact 17-7/8 inch length, 2.5 inch width and 0.149 inch thickness paired with a 5/8 inch 6-point star center hole for seamless installation without modifications on all matching 50 inch cutting deck lawn mower units. Constructed with premium heavy-duty steel material and a precision sharpened cutting edge with a high lift 1-3/8 inch air lift profile, this blade delivers superior clean and even grass cutting performance with enhanced grass clipping evacuation, effectively eliminating clumping and ensuring smooth discharge or bagging for a neat lawn finish while resisting bending, dulling and wear from contact with debris and uneven terrain. It features a durable anti-corrosion finish to protect against outdoor moisture and grass clipping buildup for long-lasting sharpness and reliable use, and the balanced structural design reduces operational vibration to optimize smooth lawn mower performance and extend the service life of cutting deck components. The exact dimensional and profile matching ensures a tight secure fit with all compatible 50 inch deck spindle assemblies to avoid wobble and slippage during operation, and the hardened steel construction maintains a sharp cutting edge for extended mowing sessions without frequent sharpening or replacement. Built to meet strict fit and cutting performance standards for outdoor power equipment cutting blades, it is recommended to refer to the original equipment owner's manual to confirm proper fit and installation guidelines for your specific machine.