Lishi 910 Extra-heavy-duty disc harrow Product description Lishi910 extra-heavy-duty disc harrow is a new-type extra-heavy-duty wide disc harrow recently developed by our company.Its main body is made of high-strength alloy steel,with sturdy structure and good designing, equipped with four sets of 10-15 tires for transport.The φ910*12mm heavy duty blade is used on this procuct for the first time in china,which makes the maxium working depth up to 30cm.This product is mainly used for land plowing and preparation before seeding and stubble cleaning after harvest in the sugar cane fields.