General Tools Thread Repair File, 11, 12, 13, 14, 16, 18, 20, 24 In. is an excellent tool designed to restore damaged external threads on a wide range of items including studs, bolts, screws, plumbing pipes, and pipe fittings. When threads become worn, rusted, or corroded, this thread repair file a reliable solution. Crafted from high carbon steel and featuring a black oxide coating, it is built to withstand tough jobs while preventing rust, ensuring both durability and long-lasting performance. Beyond its thread repair capabilities, this versatile tool also functions as a screw pitch gauge, allowing you to accurately measure the distance between threads. This dual functionality makes it an essential addition to any toolbox, providing both repair and measurement in one compact and convenient tool. Whether you are a professional tradesperson or a DIY enthusiast, the General Tools Thread Repair File is a dependable companion for maintaining the integrity of your fasteners. Model Number: 177-1