Twenty-four individual tines rip through thatch and moss at high speed, removing material from the bed of the lawn and into the hopper. Simply insert the Scarifier cassette into the PGC+ and start scarifying. Another benefit of the Scarifier cassette is there is no need to buy a separate walk-behind Scarifier and collection system. Simply unhitch the grass collector from the tractor and insert the Scarifier cassette. The PGC+ does them both simultaneously, saving time and money. In order to ensure a lawn looks great and is also healthy and disease-free, it needs to be scarified to rid it of thatch and moss.