Profile: U. S. Mfg., Inc. designs, manufactures and distributes innovative equipment for solid waste & recycling industry. Our product line includes precision-machined swing & fixed hammers, forged, infused tungsten carbide tips & blended alloy and hammer mill grates. Our hammers made from T-1 constructional alloy steel and flame cut with precision milled holes. Our grates made from AR 400 abrasion resistant certified steel and the longest wearing grates in the industry.