The Allett 17 inch aerator quick change cartridge is part of the Allett complete lawncare system. The aerator cartridge is suitable for using with the Allett Kensington 17K cylinder lawn mower. By aerating your lawn you produce slits in the ground which provide extra movement & space for extra hydration & nutrients to be absorbed. The added nutrients help the lawn to grow thicker & greener for a healthier appearance all year round.