MaxPower's 331749X commercial mulching blade for a 22" Cut Craftsman/Husqvarna/Poulan replaces 580-244001, 580-244002, 580244001, and 580244002. This blade measures 21-15/16" x 2-1/2" with a 5 point star center hole. Fits Husqvarna models HU550F, HU550FH, HU675FE, HU700F, HU700L, HU725AWD, HU725F and HU800AWD. Commercial mulching blades feature greater cutting surface for increased mulching performance, sharpened cutting teeth for a precision cut, and a centrifugal air lift design for uniform chopping distribution. Features an extra paint coating designed to protect from personal injury during handling that disappears when the blade is engaged leaving a sharp mulching edge. MaxPower blades are proudly manufactured in the USA to meet or exceed OEM specifications.