The Swivel Pulley Block is designed to hang objects of weight to lighten the load. 0.3T lifting weight of the single pulley block, which has smooth and low wear. Professional manufacturing pulley block with heat treated, high reliability.Easy to operate and maintain, high work efficiency. High strength pulley block, which has sturdy structure, is and We care for every customer's feeling. If this product does not meet or exceed your expectations, please contact us at first, we will solve the problem immediately., Manufacturer: Hilitand