Toro 16.5 Inch OEM Hi Flow blade. Hi-Flow are also known as basic blades, regular blades, or 2-in-1 blades, Hi-Flow mower blades are the go-to blades for mowers with a bagger. The blades are designed to cut the grass and Flow the clippings, propelling them up and out of the discharge chute. This Toro blade has multiple applications. Be sure to verify model and serial number to ensure the correct part.