The Genuine Factory Parts 50" XTREME Mulch Blade Set is for Xtreme mulching and bagging performance. The unique blade has additional cutting surfaces that help chop grass clippings finer than with standard blades. You'll also be able to keep mowing as the smaller grass clippings pack efficiently in the bag. Genuine Factory Part blades are original equipment blades for CRAFTSMAN, CUB CADET and TROY-BILT. Designed for precise fit and optimal performance, you can have confidence that they are going to provide you the cutting performance you need and expect from your rider and zero turn mower.