Precision meets durability with these SPI Steel Parallels, designed for exacting measurement and inspection tasks. This matched pair features impressive parallelism tolerances of 0.0003" and 0.002", ensuring consistent and accurate results for your most demanding layout and machine setup applications. Each parallel measures 6" long by 3/4" high by 1/4" thick, providing an ideal balance of stability and maneuverability. Manufactured by MSC Industrial under the trusted SPI brand, these steel parallels are essential tools for machinists, toolmakers, and quality control professionals who require dependable dimensional references. The robust steel construction ensures longevity even with regular use in workshop environments. Keep your calibration and setup processes precise with these professional-grade parallels that maintain their accuracy over time.