This aftermarket replacement left-hand cutting blade is designed to fit a wide range of 42-inch cutting decks on various lawn tractors and riding mowers, including models from Husqvarna, AYP (American Yard Products), Poulan, Craftsman, and Roper. As a non-original equipment manufacturer (non-OEM) part, it offers a cost-effective alternative to restore your mower's cutting efficiency. Engineered to replace OEM part numbers such as 532180583 and 180583, this blade features a precise 5-point star center hole, ensuring a secure and accurate fit onto your mower's spindle. With an approximate length of 21 inches, a width of 2-1/4 inches, and a thickness of 0.150 inches, it is crafted from durable steel to withstand the rigors of regular lawn maintenance. This replacement blade is specifically designed for the left side of the cutting deck, working in conjunction with the right blade to provide a clean, even cut across your lawn. Ideal for routine maintenance, it helps maintain the health and appearance of your turf by delivering consistent cutting action.