Chain Lever Binder. All load bearing fittings are forged and tempered. The entire assembly is powder coated and the hooks have 360 degree rotation. All our binders have the size, working load and breaking strength stamped on the handle. 5/16" - 3/8" To be used with 5/16" Grade 70 or 3/8" Grade 43 Chain. The working load limit is 5,400 pounds.