Grinding and Sizing Company was founded in 1947 in Lufkin, Texas. The primary focus of the company was the production of extenders for plastics; this evolved into producing fillers for the large wood products industry in East Texas. Over the years, that focus has broadened considerably to the point where Grinding and Sizing Company has become a preferred wholesale manufacturer for many industries. The largest part of Grinding and Sizing Company's business is the production of materials that go into the drilling fluid segment of the petroleum industry. The Lufkin facility is dedicated to the grinding, drying, sizing, blending and bagging of numerous private label drilling fluids products that are used for seepage and lost circulation control. Grinding and Sizing Company meets all the stringent Texas Natural Resource Conservation Commission's air quality emissions standards.

As a complement to the main Lufkin location, a custom bagging and blending facility, Grinding & Sizing - Houston Plant, was opened in 1994. Grinding & Sizing - Houston Plant, is a custom blender and bagger of powder and granular products. With 3 lines dedicated to white, gray or black products, the facility has the ability to meet production deadlines in a timely fashion while producing a high quality product.

The Reliable Equipment Plant was created in 1997. Reliable produces top quality equipment for Grinding and Sizing Company's plants as well as maintaining service on this equipment. In addition to this function, Reliable Equipment Plant is available to fabricate custom equipment to meet customer specifications for grinding, blending, and bagging processes.

For Quality control and product development purposes, Payzone Testing Lab was created in 2001. This lab is equipped to test all drilling fluid products according to industry standards and is available for customer product development and research work.

Grinding and Sizing Company intends to be the preferred Supplier / Manufacturer to the Drilling Fluids sector of the Petroleum Industry. Grinding and Sizing Company will seek out and satisfy its customers' wants and needs. Because of Grinding and Sizing Company's small size, it is able to react to special requests faster than any competitors. It has developed a reputation for being honest, trustworthy and responsive to the needs of customers, both large and small.