The SINGLE-SHANK RIPPER: The 100 Series is ideal for breaking up hard soil or furrowing cultivated soil. Designed for Category 1 tractors up to 25 HP. The 1" x 4" shank is adjustable to 19? length for ripping and 15" length for furrowing. The shank is shear-bolt protected and equipped with a 2" wide, hard-faced replaceable point. 200 Series is recommended for breaking up compacted soil to increase root growth and yield. This rugged built unit is available with a 1" x 6" x 23" shank and designed for Category 1 tractors up to 50 HP. The shank is shear-bolt protected and equipped with a high carbon heat-treated replaceable point. 300 Series is ideally suited to break-up hard and compacted soil for better water penetration and root growth. This unit is constructed of heavy-duty 4" x 8" structural tubing and is equipped with a 1" x 27" parabolic shank and designed for category 2 tractors up to 75 HP. The shank is shear-bolt protected and equipped with a high carbon heat-treated replaceable point. Models 200 and 300 are Quick Hitch compatible.