Having to repair damaged bolt threads is aggravating. Having to deal with cross-threaded bolts after a repair with a traditional thread chaser goes wrong is even worse. The Steelman Professional 9/16-18 SAE Split Die Thread Chaser is designed to remove the worry of cross-threading by allowing repairs to begin behind damaged threads. By starting the repair on undamaged threads, you can ensure a continuous repair that is perfectly aligned with the original threads. Made of hardened high carbon and chromium steel, this tool features dual indexing pins that provide correct tooth alignment and hold the tool straight and secure during use. With an outer diameter of 1-inch, this hex-shaped thread repair tool can be used with any 1-inch SAE socket, adjustable wrench, or combination wrench. Designed to meet or exceed 150% of ASME torque requirements, this tool will last for years of reliable use in any professional garage or home workshop. WARNING: To prevent damage to bolt threads, only use dies with hand-driven tools. Save time and reduce frustration by repairing broken threads right the first time with Steelman Split Die Thread Chasers. STEELMAN is an industry leader in automotive and industrial specialty tools and equipment. We manufacture high-quality, innovative products designed to meet the specific needs of mechanics, contractors, and other working professionals. Our selection of tools includes specialized automotive items like diagnostic devices, inspection lights, maintenance tools, and tire repair supplies, as well as traditional hand tools like torque wrenches and screwdrivers. So whether you are a pro mechanic or a do-it-yourself enthusiast, STEELMAN has the tools you need to get the job done.