Adaptable to chisel plows, field cultivators and NH3 applicators. For use in trashy ground. Universal mounting hardware for 4" x 4" or 4" x 6" tool bars included. 17" or 20" ripple blades with straight or offset shanks available. See selection guide. Tapered roller bearings are lubricated, sealed and adjustable. The malleable iron spring cushion feature will reduce damage by rocks and obstructions. 600 lbs. down pressure.