When you want an immaculate lawn, the MTD Grass Catcher Kit offers a convenient alternative to mulching. The heavy-duty polyester bag and heavy-gauge steel frame are built to last and attach easily to both side-discharge and "3-in-1" mowers. Assembly of the grass catcher was not quite as simple--mainly because the instructions were a bit confusing--but once assembled, the grass catcher was a handy mower accessory. The kit comes with bag, frame, mounting hardware, and instructions. Two-year manufacturer's limited warranty.