Maxpower s 331742S includes (1) 3-in-1 style blade for many 42 in. cut Craftsman Husqvarna and Poulan mowers. This blade replaces OEM # s 139775 and 532139775. It measures 21-1/16 in. L X 2-1/4 in. W with a 5 point star center hole. 3-n-1 style blades are designed for use in side discharge mulching and bagging style mowers. To ensure proper fit please verify the OEM number of the blade you are replacing matches the OEM numbers listed in this description. MaxPower blades are proudly manufactured in the USA to meet or exceed OEM specifications.