Precision meets reliability with these SPI Steel Parallels, designed for exacting measurement and inspection tasks. This matched pair features dimensions of 6" long x 1-3/4" high x 1/2" thick, crafted from durable steel for long-lasting performance in workshop and industrial settings. With exceptional parallelism tolerances of 0.0003" and 0.002", these parallels deliver the accuracy needed for critical machine setup, calibration, and layout work. The perfectly matched pair ensures consistent results when performing comparative measurements or establishing reference planes. These versatile tools are essential for machinists, toolmakers, and quality control professionals who require dependable dimensional references. Add these premium SPI parallels to your measurement toolkit for reliable performance in precision applications.