Purchase the only quick tool carbide scarifier replacement kit for Onfloor 6.5" and 8". The Quick Tool Carbide Scarifier helps to replace your old ones for our new concrete quick tool and also needs receiver plates to function. The average set of scarifiers lasts about 2,000 to 4,000 square feet. It removes thin-set coatings from concrete floors. The replacement kit comes with durable drivers and consumable attachment.