Amazon.com : Maxpower 330100 16-Inch Universal Power Rake/Dethatcher Lawn Mower Blade : Garden & Outdoor.
Universal 19"/20" lawn mower blade comes with tines to rake, dethatch or scalp lawn plus side discharge, bag and mulch to create six.
The Universal Power Rake 6-in-1 Blade is a multi-purpose blade that easily attaches to your lawn mower. This blade dethatches, rakes, mulches, scalps, bags .
Small dethatching blades are sold as lawn–mower attachments, but they're not the best choice because they put a lot of strain on the mower.
Not all lawnmower blades are created equal. That's because different types of blades are better suited for specific mowing applications and turf types.