Quickly take out the ‘quick cartridge’ cutting cylinder of your Allett Classic or Kensington 17K Petrol Cylinder Lawn Mower; & replace it with this custom designed & expertly constructed scarifying cartridge & you have two machines in one. Scarifying your lawn, which involves raking or digging into it with sharp steel tines, is highly recommended lawn maintenance activity. It removes dead & unwanted material; helps with aeration & efficient irrigation; & encourages new shoots & roots for a more luxuriant lawn. This 17" scarifier cassette is suitable for the:- Allett Classic 17L Petrol Cylinder Lawn Mower- Allett Kensington 17K Petrol Cylinder Lawn Mower Plus it will also fit all Atco / Quacast / Suffolk Punch 17" Cylinder mowers built from 1997 & which use the QX Cassette system.