Sealey-AK315-Universal-External-Thread-Repairer-Chaser-Sealey-AK315-Adjustable-thread-restorer-to-suit-Metric-and-Imperial-threads-from-31-75-to-127mm-1-1-4-to-5-external-diameter-Simply-attach-to-undamaged-section-of-thread-then-wind-back-the-thread-with-the-knurled-adjuster-and-the-chaser-will-restore-the-damaged-thread-section-Built-in-storage-for-six-dies-Sealey-AK315-Universal-External-Thread-Repairer-Chaser