Grinding and Sizing Company, founded in 1947, is a supplier and manufacturer to the drilling fluids sector of the petroleum industry. The company offers powder and granular products. It offers grinding services for various materials, such as resins, polymers, plastics, fibers, nut hulls, minerals, clays and chemicals. Grinding and Sizing Company provides fabrication and repair services for material handling equipment. The company offers drying, sizing, screening, blending and bagging services. Its division Payzone Testing Laboratory specializes in oil-field chemicals testing services and laboratory technicians offer assistance with new product development. The company also provides packaging, as well as reclamation and reworking services for hardened and damaged products. Grinding and Sizing Company has a custom bagging and blending facility located in Houston.