Designed for winches with a rated line pull up to 4,000 lbs. including the EX1, X1, X2, LT2000, UT3000, LT3000ATV, S3000, S4000, Terra 25 and Terra 35.The Superwinch pulley block is specifically designed for maximizing the pulling power of a winch. This 8,000 lb pulley block allows the winch to effectively use the power of the double line pull. The hook on the pulley block is removed and the winch cable line is run over the pulley. The pulley block hook is then replaced and then attached to a strap wrapped on the forward fixed-object. The hook on the winch cable end is attached to the front of the vehicle being pulled-or to a fixed object close to the front of the vehicle. Warning: Do not use for hoisting.