1. Stable Without Shaking: These engine load levelers have 2 extra support chains that are flexible enough to balance heavy loads at various angles and reduce stress. They help share the weight and keep the engine stable so that it does not shake or fall off during handling.2. Safe to Use:This engine hoist load leveler can be used for engine hoists, shop cranes and cherry pickers; with loads up to 4000 lbs. It provides enough strength to lift a variety of engines or other heavy loads for the toughest projects in the garage.3. Easy to Operate: The heavy duty steel engine hoist leveler is designed with a comfortable and easytouse crank handle that can be used with one hand to help slightly change the balance of the engine load; it mainly helps stabilize the engine and tilt it to slide into the transmission and engine mount.4. High Loadbearing Capacity: The engine load levelers are made of sturdy top grade structural steel with strong load capacity. They can balance up to 2 tons/4000 pounds with high quality construction and heavy duty materials.