QualityParts From Oregon That you can depend on. 100 Series Blades formed with double bevel technology for extended cutting edge and reduced blade noise: Made with Boron Steel for extra durability and ductility; Maximum mulching length; Major brand replacement: MTD, Cub Cadet, Craftsman, Troy Bilt (1995 and newer); Fits: 742-0427, 742-04276S, 742-0741, 742-0741A, 942-0741, 942-0741A, 01002810, 490-100-M084; ; Oregon Equipment Parts 198-049 BLADE,MTD 21 IN