The GR SET (88) 1 3/8-12 CL3A from Field Tool Supply is a comprehensive set of gage rings designed for precision measurement and quality control. This set includes gage rings with a 1 3/8" diameter and a 12 thread count, making it ideal for various machining and manufacturing applications. Crafted from high-quality materials, these gage rings ensure durability and accuracy, meeting stringent industry standards. The CL3A classification indicates a high level of precision, making this set suitable for critical applications where exact measurements are essential. Each gage ring is meticulously manufactured to provide reliable performance, ensuring that your measurements are consistent and accurate.