Genuine Original Equipment Manufacturer (OEM) parts! This 4-in-1 blade (part number 580244002) is for lawn mowers. The 4-in-1 blade 580244002 combines the features of a high-lift blade with a mulching blade for bagging, discharging, mulching, and shredding leaves. This blade is 21-1/2 inches, and is sold individually. Wear work gloves to protect your hands when installing this part. For Craftsman.