The SP10 Series Soil Pulverizers have two 68-kg (150-lb) compression springs, and the SP20 Series Soil Pulverizers have two 72.6-kg (160-lb) compression springs to keep the roller in contact with the ground and force the spikes into the soil down to 25.4-mm (1-in.) deep.
The SP20 Series Soil Pulverizers feature a double set of 12.7-mm x 50.8-mm (0.5-in. x 2-in.) bar-type cutting teeth. Their staggered mounting slices the surface every 71.1 mm (2.8 in.) for superior soil preparation.
The steel roller on all SP Series Soil Pulverizers are studded with 9.65-mm x 25.4-mm (0.38-in. x 1-in.) spikes that penetrate the toughest surfaces, breaking down clods and creating a fine finish.
Add an optional second roller with two 36.3-kg (80-lb) compression springs for an even smoother finish.