Precision-engineered for machining and inspection applications, these SPI Steel Parallels come as a matched pair with exceptional accuracy. Measuring 6" long x 1-1/4" high x 1/2" thick, these parallels feature impressive parallelism tolerances of 0.0003" and 0.002", making them ideal for setup work, inspection tasks, and precision measurement applications. The robust steel construction ensures durability and dimensional stability over time, while the matched pair design guarantees consistent performance across both pieces. These parallels serve as essential tools for machinists, quality control professionals, and anyone requiring precise workpiece positioning. Their rectangular profile provides a stable platform for holding parts at exact heights during machining operations or comparative measurements. The SPI brand is known for manufacturing high-quality dimensional measurement tools that meet rigorous industry standards.