The GAGE BLOCK 0.138 GR 0 by Field Tool Supply is a high-precision measurement tool essential for calibration and setup tasks. Measuring 0.138 inches, this gage block is manufactured from premium materials to ensure durability and precision. It complies with ISO standards, making it suitable for various industrial applications. Ideal for machinists and quality control professionals, this gage block provides reliable performance in setups and measurements. Its compact size allows for easy handling and storage, making it a valuable addition to any toolkit.