Garage Door Jackshaft Chain Hoist Garage Door Openers 3:1 Reduced Drive Heavy Duty Hoist for Roll Up Doors and Jackshaft Garage Door Openers Chain Hoist for Roll Up Doors

✅Strong and Durable: The high-quality iron and galvanizing process make this product wear and corrosion-resistant and ensure long-term use. ✅Stable Operation: Ball bearings and lubricating oil reduce friction during rotation, and the 3:1 transmission ratio and reduction drive ensure smoother lifting and lowering. ✅User-friendly Design: The large diameter of the gears (5.91in) and the 3:1 ratio allow you to use as few turns as possible to raise the lifting height, thus saving more energy. ✅Good Stability: Sturdy chains and construction give the product a weight capacity of up to 331 lbs, so you can lift your garage door with confidence. ✅Practical Tool: This product allows you to pull up the roller shutter or garage door easily, which is very practical.