This Jaw MFG Nu-Thread Inch No. 1 Thread Restorer File is a high-quality tool designed to help you restore your threaded fasteners to their original performance. It is made in the United States and comes in a single piece, with no warranty. This thread restorer file is suitable for use with SAE systems of measurement and is available in inches. The Jaw MFG Nu-Thread Inch No. 1 Thread Restorer File is a must-have for anyone who wants to keep their threaded fasteners in top shape. It is an excellent addition to your tool collection and is perfect for use in automotive applications. This single item set is ideal for those who need a reliable and high-quality thread restorer file.