The GAGE BLK SET 36PC RECT AS-0 ST from Field Tool Supply is a comprehensive set of rectangular gage blocks designed for precision measurement. This set includes 36 pieces, crafted from high-quality steel for durability and accuracy. Each block is meticulously finished to ensure a flatness tolerance that meets industry standards, making it ideal for calibration and inspection tasks. The dimensions of the blocks vary, providing versatility for different applications. This set is perfect for machinists and engineers who require reliable measurement tools for their projects.