B-Line B305HDG, 7/8″ Jaw Capacity, 600 Lb, Steel, Beam Clamp with Screw, 1pc. B-Line B303HDG, 7/8″ Jaw Capacity, 400 Lb, Steel, Beam Clamp with Screw, 1pc. We have new products in manufacturer boxes, as well as loose and shelf-worn quality products to save you even more money.