The MTD MRK6101A-ET is a genuine replacement blade set containing two high-quality mower blades, each measuring 539.75 mm (21.25 inches) in length and 63.5 mm (2.5 inches) in width, with a thickness of 3.81 mm (0.150 inches). Each blade features a 6-point star center hole for secure mounting. Designed for optimal cutting performance on 42-inch cutting decks, this blade set ensures a precise fit and superior durability for various MTD-family brands, including Cub Cadet, MTD, Troy-Bilt, Yard-Man, Yard Machines, Huskee, and Bolens lawn tractors and zero-turn mowers. It replaces OEM part numbers such as 742-0616A and 942-0616A.