●The only one with three bearings. ●Unique curling design-This leature enables the hand chain to successlully feed directly into the wheel sprocket from many directions and angles. ● G8O heat treated alloy load chain. ● Forged alloy Steel Hooks-Industrial rated hooks rotate 360 degrees for easy rigging. Hooks slowly stretch to indicate an overload situation increasing jobsite safety. ● Sealed roller bearings-Greatly improving performance and serve life of the product. ● Certification-Load tested to 150% of capacity with certificate.