This is an authentic replacement part manufactured for use with Craftsman walk-behind lawnmowers. The blade is angled to allow the clippings to rotate through the cutting deck to produce fine clippings for side discharge and mulching. Lawnmower blades wear out over time and can cause the grass blades to tear making frayed endings that can diminish the look of the lawn. A new mower blade will allow for a cleaner cut keeping the lawn looking good. This blade is sold as an individual replacement part. 21&#34

The Hex Flange bearing, .630 inches I.D. is an OEM part. Black in color and made of metal, it is sold individually. It is installed using a wrench or socket and its installation has been rated as Easy by consumers. This part attaches on the worm gear shaft in the cute, and is used to secure the worm gear on the shaft. If broken, you will no longer to be able to control the chute (or you may only have partial control). This breakage can occur due to fatigue over time, and means the part must be replaced. Refer to your owners manual or model number to ensure you are purchasing the correct part.