To use this heavy duty 40 inch working width moss rake attachment, the SCH 40 inch Grass Care System Heavy Duty Carrier Frame the basic unit to which the moss rake has to be attached must also be purchased.The moss rake is fitted with one row of spring tines which will tease out moss and dead thatch from lawns. This light rake is an ideal unit for use on finer grassed areas such as tennis courts and finely cut lawns. The rake can also be used for freshening up gravel drives. Manufacturer's 1 year warranty