SSH and SSH/HP forestry tillers for 160 to 500 hp tractors ensure superior performance and reliability. The large rotor makes it possible to shred stumps up to 28 inches in diameter, and more teeth shred better than ever, even for roots up to 20 in deep. The combination of quality materials and technology - such as the counter blade and the interchangeable internal wear plates - provides unmatched productivity and reliability. The SSH/HP model also comes with a gearbox cooling system.