Allett 17 inch Quick Change scarifier cassette Simply remove the standard cutting cylinder from your lawnmower, insert this 17 inch scarifying cartridge, & your Allett cylinder mower is immediately transformed into a powered lawn scarifier This will clear your lawn of moss, thatch & other debris, allowing it to breath & promoting new growth. Suitable for the Allett Kensington 17K & Allett Classic 17L petrol cylinder mowers, the ATCO Balmoral 17SK & Suffolk Punch P17SK