RTC - 004 SONAFARM 'EXTRA HEAVY DUTY' Rigid Tyne Tiller is multipurpose Heavy Duty Tiller. Main frame is made up of 50mm Solid Square duly reinforced by several central supports. Tynes can be moved latterly and vertically. Rear tynes have wider shovel points to give better tillage. By minor adjustment the tiller can be converted into ridger or grass clearing implement. It is the most versatile implement.