4:1 Gear Ratio Chain Hoist for Roll Up Doors Garage Door Chain Hoist Opener with 26ft Chain for Roll Up Doors Warehouse Garage Door Openers 330Lbs Load Capacity

Effort-saving: This product allows you to pull up your roll-up door or garage door with less effort, which is very labor-saving. Smooth Lifting: The pre-lubricated lift ball bearing can reduce friction during rotation and ensure smoother lifting and lowering. Simple Installation: With a simple structure and complete accessories, the product can be installed in a few minutes. Exquisite Workmanship: The stamping and galvanized processes can effectively improve the texture and stability of this product.