The MTD 964-05070 Lawn Mower 21" Grass Bag Assembly collects grass clippings efficiently for a cleaner mowing experience. Designed as a replacement 21-inch grass bag assembly, it fits compatible MTD lawn mowers to capture clippings discharged from the mower deck during operation. It works by attaching securely to the rear discharge opening, where airflow carries cut grass into the bag... https://www.wholetoolbox.com/mtd-964-05070-lawn-mower-21-grass-bag-assembly