Six inch hydraulic cylinders render 85,000 lbs of pressure at 3000 psi. Can cut trees at ground level. Cuts trees up to 17 inches in diameter. All joints are greaseable, so as to extend life expectancy of your tree shear. The blades are made of 1” RT-400 steel, 4 times more durable than ordinary steel, and are also replaceable. Weight 1,600 lbs.