Precision meets durability with this SPI 8-piece steel parallel set, an essential tool for machinists and quality control professionals. Each parallel measures 6 inches long with varying heights from 1/2 to 1 inch and thicknesses from 1/8 to 3/8 inch, providing versatility for different setup requirements. Crafted with high-quality steel and hardened to 52-58 RC, these parallels deliver consistent performance and exceptional wear resistance in demanding workshop environments. The set comes as 4 matched pairs, ensuring perfect alignment and stability when supporting workpieces during inspection, layout, or machining operations. Their precision-ground surfaces maintain flatness and parallelism to exacting standards, making them indispensable for achieving accurate measurements and setups. Whether you're working on a milling machine, surface grinder, or inspection table, these SPI parallels provide the reliable foundation needed for precision work.