Spec HD (heavy duty) is the tougher version of regular SPEC cultivator. That three row cultivator is designed for stubble cultivation and tillage. Equipped with double spring proteciton with updated swingarm geometry, is able to withstand much greater ground preassure than the regular machine. Minimal activation imput force is 550 kg per tine, which allows, after removing detachable wingshares, aggressive tillage as deep as 30cm. Variety of press rollers to choose from, different toughness points and profiled tines, fulfill the image of the tough while universal machine.