Oilfield & Heavy Equipment Supplies Grey Crane supplies high-quality, project-ready materials for oilfield, marine, and heavy industrial sectors. Mechanical Spare Parts Heavy-duty mechanical components and replacement parts for drilling rigs, heavy machinery, and industrial equipment. Industrial Salt & Bentonite Supply of drilling-grade bentonite, industrial salt, and mineral products used in oilfield operations, water treatment, and industrial processes. Structural & Metal Products Custom structural steel fabrication materials, engineered metal products, and heavy construction components for large-scale industrial projects.