The PIN GAGE VT .551 (-) STEEL from Field Tool Supply is a precision measuring tool designed for checking hole sizes and ensuring accurate fits. This pin gage features a diameter of .551 inches and is manufactured from high-quality steel for durability and reliability. It is essential for quality control in machining and manufacturing processes, allowing users to verify tolerances and specifications. The negative tolerance indicates a specific size range, making it ideal for applications requiring precise measurements. This pin gage is a must-have for engineers, machinists, and quality assurance professionals.