Especially designed to provide high durability Lower link holding* With 19 mm. metal plate, tractor is more durable and capable of tolerating impact/traction. Check Chains* Diameter of Check Chains is increased to 20 mm, providing more durability by 20%. It is easier to adjust implements with hexagon-shape adjusting equipment. Lifting Rod** Size of spiral is increased to 30 mm, providing more durability by 50%. *available in 70-105 horse power models. ** available in 70 horse power model.