Heavy Duty Chain Harrows – 4ft & 6ft In Stock. Ideal for seed beds, aerating, de-thatching, breaking up manure and levelling mole hills. High tensile steel. Heavy duty design. Spreader bar for improved levelling. 3 pull positions – Passive, Aggressive & Smooth. 4ft – 60 tines – 45kg. 6ft – 84 tines – 65kg.